Download Micro Gate ?GRAPH Specifications
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THE ALES'S MICROSERIES USER'SGUIDE FEATURING NN,trEi,||/I'EE/R'IJ J fa- aJaa-a t- ^rr,trDl'ltt t;rrrlF'D.@ tv -ltaaa I a -! aJaa-a A'i',,!E,'|)'F,frJE' tlltlt rv - aJaaata ft'r|'t'l)Ecl -rlt aJaa-a ^,I,^Ef)El'/l'AIIAED@ tv-taa all' aJaa-a rt'r|l'if1),trrrE aJaa-ra t- vtt- !v-t ,.',tD G.tJa. I INTRODUCTION THEALESISMICROSERIES The EssentialSignal Processing/MusicProductionSystem MIcRoVERS9I,mlcno LIMITER9MIcRoGATEPMIcRoEQ. M I C R OE N H A N C E R P a nMIC O R OC U E AM P. Toger herr hey represent the culmination of yearsof researchby Alesisto refine t h e m o s t m u s ica lfu n cti o n so f th e si x most essentialm usic production toolsinto a powerful,integrated system.Eachunit is containedin a compact,cost-effective, interlocking one-thirdrack spacepackage- designedfor maximumefficiency with minimum hassle. Withthe MicroSeriesin yourstudio,recordqualitysoundscan nowbe achieved. And,of course,all six unitsare full stereo(with the exceptionof MICROEQ), full bandwidth,and designedfor fast,trouble-free operation. Belowyou'llfind a brief descriptionof each unit,followedby setuphintsand application ideasto helpyou get the mostfrom yourgear...so youcangetthe mostfromyourmusic. MICROVERBll has revolutionized the recordingindustryby pro v i d i n gt h e si n g l e mo st i mp o rta n aspect t of music - the controlled c r e a ti o no f a mb i e n ceU . ti l i z ing16 bit linearPCM processing, places MICROVERB ll awesomepowerin the hands o f a n y e n g i n e e r,fro m 4 tra ck b e d ro omstudiohobbyiststo workingin worldclassrecording seasonedprofessionals facilities. T h e M I C R OL I M I T E R ,a s o f t - k n e ep, r o g r a m - d e p e n d e n t greatly compressor/limiter, addspunchto vocalsand instruments, improvesthe signalto noiseratioof tape recordedtracks,and smoothsout fluctuating dynamics.Attacktime and compression ratio adjust automatically so you won't waste valuabletime for the mostmusically searching correctsettings. The MICROGATE is a combinationnoisegate/specialeffects processorthat is usefulfor eliminatingincessantbackground noisebetweenmusicalpassages,for creatingspecialeffectslike gatedreverb,and for tightening up loosetimingin rhythmtracks. INTRODUCTION cont'd (especially kick drumsand bass guitars).The delay and rate controlsallow you to set the lengthof time that the gate stays openandthe slopeof the gateas it beginsto close. equalizercompletewith The MIGROEO is a 3 bandparametric s w i t c h a b l eb a n d w i d t hc o n t r o l s .P e r f e c t l ys u i t e d f o r t h e requirements of stageand studio,the MICROEQ can be used w it h a n y e l e c t r i cin stru me not r mi cro p honer equir ingtonal alteration. The MICROENHANCERcan be thoughtof as an automatic equalizer,used duringtrackingand mixdownwhen you need to add brillianceto instrumentsand to restorepresenceand clarity lost in the recordingprocess.And the MICROENHANCERdoes this withoutaddingdistortion, a problemfound in othersignal enhancers. The MICROCUE AMP is a two channelheadphoneamplifier that allowsyou to expandyour headphonemonitoringsystem.lt alsofeaturesa secondinputwhichcan be usedwith a guitaror keyboardfor privatepracticing.And you can even chain MICRO CUE AMPS togetherto give you all the additionalheadphone outputsthatyou needfor biggersessions. Nexttime you listento a greatrecording,you will very likelybe hearingthe Alesis MICROSERIESin use.Certainlyyou should be usingall six MICROSERIESproductsin your studioand in yournextliveperformance. Thismanualwillshowyou how. ACKNOWLEDGETAENTS FORlr,ilCROEA p.37-/o Reproduced whhpermissionol the publisher,HowardW. Samsand Co. Modern RecordingTechnioues by RobertE. Runsteincopyright1974. Reprintedwithpemissionfromthe NovemberDecember issueof Recording Engineer/Pmducer. Ovedand @yright 1972, IntertecPublishingCorporalion, Park,Kansas. TABLEOF CONTENTS INSTALLATION Beforeunpackingyour new Alesis MlcRo sERlEs unit,take a momentto look throughthis instructionmanual.we've made it brief and informative and it will answerany questionsthat you mighthave.some helpfulsetupthoughtsare inctudedalongwith someapplication hintsfor eachunit. EachMlcRo sERlEs unit is designedand engineered to give you the highestlevel of professionalperformanceand quatity. we've madeeach unit musicaland easy to use so that you can get the most fromyour musicwiththe leastamountof effort. lnstruments,Microphones The Alesis MlcRo SERIEShas highimpedance inputsthatare ideallysuitedfor use eitherwith instrumentpickupsor line level signals.Althoughmicrophones can be connected direcilyintoany of the MICROSERIESunits,it is recommended that they be connectedto a mixingconsolefirst and then connectedto the MfCROSERIESas describedin Figures2 or 3 for quietest operation. Of the MICROSERIESunits that are stereo,such as the MICROVERBll, MICROLIMITER,MTCROGATE,and MTCRO ENHANCER, eitherleftor rightinputsmaybe used,butsignalwill only appearon the same side output(example:left input-left output)sincebothlettand rightchannelsare totallyisolated.See tigure 1 F I G U R E1 - M O N O M I C R O S E R I E S C O N N E C T I O NT O INSTRUMENT OR MICROPHONE TOAMPLIFIER OR MIXINGCONSOLE INSTRUMENTOR LEFTOUTPUT INSTALLATION cont'd This is NOTtrue of the MICROVERBll, however'lf the left input ll is used,the inputsignalwillappearas onlyof the MICROVERB at the dry sideof the mixcontrol' (present in channels) both mono MixingConsotes All of the MICROSERIESunits can handlemono or stereo sends at all systemlevels.The input circuitryof the MICRO SERIEScan easilyhandle+4dBvlevels(+20dBvpeaks),while withthe extremely havingenoughinputor outputgainto interface recording systems. low signallevelsof budget The MICROSERIESunits may be connectedto the mixing consolein severalways. ll, the In the caseof the MICROENHANCERor MICROVERB unit can be used to effectseveralinstrumentsat once by using the auxiliarysend and returncontrolsof the console.Simply connectan aux sendof the mixingconsoleto eitherof the inputs ll (or 2 aux sends of the MICROENHANCERor MICROVERB co nnect e dt o b o t h th e l e ft a n d ri g h t i n p uts of the M ICRO ENHANCERor MICROVERBll for stereooperation)and then ll or MICROVERB connectthe outputof the MlcRo ENHANCER in back to eitherthe aux returnsor inputchannels.Remember, this situation,the mix controlshouldalwaysbe set fully to the for maximumeffect.Seefigure 2 right(clockwise) FIGURE2. STEREOCONNECTIONTO MIXING CONSOLEVIA AUX SENDS rry1622m AUXSEND2 LEFTINPUT RIGHTINPUT M I C R OS E R I E S INSTALLATION contd The recommended methodof interfacing for the MIGRO LlMlrER,MlcRo EQ,or MlcRo GATEis to connectthe unit directlyto the insertsendandreceivepatchpointsof thechannel that is to be effected.This methodwill work for the MlcRo ENHANCER andMICROVERB ll as well,but keepin mindthat onlyoneinstrument (in monoor stereo)at a timewillbe effected. Seetigure 3 FIGURE3. STEREOCONNECTION TO MIXING CONSOLEVIA CHANNELINSERTPATCHPOINTS as INSERTSEND 1622u INSERTRETURN LEFTOUTPUT ln the caseof the MICROVERBll, however,dedicatingseparate units to individualvoices or instrumentsallowsyou to exercise greatercontrolover the ambienceof each sound.An "overall" reverbcan then be usedto tie all of the soundstogetherintothe samespacefor uniformity. See figwe 4 INSTALLATION cont'd Anotherway to interfaceMICROSERIESunitsto a mixeror recordingconsolewould be in-lineacrossthe outputof your mixingconsole. See figure 4 This would be the case if you neededto effectthe entire mix and would be an especially appropriate use for the MICROENHANCER,MICROLIMITER, and in somecases,the MICROVERB ll. FIGURE4 - STEREOCONNECTION TO THE MICROSERTES USINGTHE MAINOUTPUTS a'*.'1622re MAINOUTLEFT MICRO SERIES LEFTOUTPUT RIGHTOUTPUT The MICROSERIESunits(withthe exceptionof MTCROEe) are especiallydesignedfor stereoprogrammaterialas all of the unitsare trulystereowithcommonparameter controlsto prevent "centershifting",which means that the balancebrieflyleans towardsone side due to short term peakson one side of the stereoprogram. The MICROEQ canalsobe connected thisway but 2 unitsmust be used since it is a mono unit. MIGROCUE AMP(s)can be connectedin this manneras well to expandyour headphone monitori ng capabilities. 6 INSTALLATION cont'd Mounting All of the unitsin the Alesis MICROSERIESare rack-mountable in the Micro Rack Adapter, where any three unitsfit perfectly. Assemblyis quick and simplewith a singlescrewsecuringeach devicein place.The uniquedesignof the MICROSERIEScase allowsthe devicesto lock togetherto form a solid rack package, or to standaloneas singleunits. Power The MIGROSERIESis poweredby a remotesupplyproviding9 volts AC througha 3.5mm plug. This externalpowersupply approachkeepsstray magneticfieldsfrom interferingwith low levelsignals,allowseasy conversionto alternatepowersources (220V),and furtherreducesthe unit'sphysicalsize and valuable panel space.Althoughmany MICROSERIESdevicescould be poweredby a singlesupply,this is not advisable as groundloops couldpossiblyoccurbetweenunits,leadingto excessivehumand noisein the system, MICROVERBYI aE-z .\ zlr-sts ltlGlllllrEEtZ" .@:@@T@m POWEN DEFEAT o o \-/( nuoc l{ R (X a }( \_/ \-/ \-/ ee25 ALESlscoRpoRATroN )t LOS ANGELES, CA MADErNu s a - )( \ tt o \-/ \_/ *#tE1::8yi8.,,j8.,.""6,11i,ilrt6". PERSoNNEL SEBVcE Description MICROVERBll is a revolutionin the developmentof digital ratio reverbin that it representsa phenomenalprice/performance while reducingthe physicalsize from large,bulky hardwareto what yo u c a n n o w h o l d i n th e p a l m o f y our hand.The 16 programsin MICROVERB ll are the resultof yearsof exhaustive of soundas it occurs researchby Alesisinto the phenomenon naturallyin space.Fromsmall,intimateroom settingsto large spacesto usefulgatedreverbeffects,MICROVERB unobstructed powerful levelof sonicflexibility that will expandand ll offersa polishthe soundof any recording. Set Computer) Utilizing the AlesisR.l.S.C.(ReducedInstruction p r o v i d e s l l clean,quiet, M I C R O V E R B a r c h i t e c t u r et,h e professional with the cost and simplicityof digitalreverberation springunits.The entiredigitalprocessingsystemis containedon a singlechip,developedby the AlesisResearchDepartment s p e c i f i c a l l yf o r t h e M l c R o v E R B l l . U s i n g h i g h s p e e d ( CMOS)silicon c omp l e m e n t a r y-me ta l -o xi d e -se mi conductor processing, the MICROVERBll chip replacesseveralcircuit whileconsumingvery littlepower. cardsof components The reverbprogramswere developedon our interactiveroom the objective system.Philosophically, simulationand development of reverberationis to enhancea dramaticperformance,adding MICROVERBYI contd space,power,and depth.Naturalspacestend to sound more pleasingthan the simulatedreverbtypes such as springsand plates,andfor thisreason,we useroomterminology in desiribing our programs.The programscover a wide rangeof sizes and qualities,and includesuch unnaturalconcepti as gated and reversetypes. Controls The Input controlsets the levelof signalthat is appliedto the MlcRovERB ll and shouldbe set so the overload Indicator readsin the redonlyon occasionaltransients. The Mix controldetermines the amountof wet signal(reverb)or dqysignalsentto the output. lf the Mix controlis set all the way to the right,thenonlyreverbwillbe heard.lf the Mix controlis set all the way to the left,then only dry (uneffected) signatwill be heard.The 12 o'clockpositionwill resultin a 50/50mixtureof dry to reverbedsignal. The Output controlsets the output level of both channelsof MICROVERB ll. Thisshouldbe set so thatthe unitbeingfed by MICROVERB ll is notoverloaded. The Program Select selectsone of MICROVERBll's 16 reverb programs. ntCnOYERBllPrograms SIALLI AMBIENCE SXALL2 AMBIENCE STALL3 SMALLROOM SIALT' SMAII PI ATF ED|UT T SMALL/MEOIUM ROOM TEDIUT2 SMALL/MEOIUM ROOM TEDIUU3 MEDIUMROOM TEDIUT' MEDIUMPLATEi STRONG IMMEDIATE ATTACK TEDIUT5 MEDIUM/LARGE ROOM T€OIUX 6 MEDIUMPLATE/SOFTER DELAYED ATTACK LANGE1 LOWDIFFUSION VOCAIROOM LARGE2MEDIUM/LARGE ROOM LARGE3 LARGEROOM LANGE4ENDLESSSPACE GATE.I POWERGATE GAT€2 BRIGHTGATE The OverloadIndicator is actuallya 3 coloredLED that shows severalinputconditions.When the indicatorglowsamber,the inputsignalto the MICROVERB ll is too low and the lnput level shouldbe increased.Whenthe indicatorglowsgreen,the signal presentlybeingfed to the MICROVERBll is a usablelevel. When the indicatorglows red, the MICROVERBll is being MICROVERBYI contd overloadedand the Input controlshouldbe decreased. The Bypass Jack, locatedon the rear panel, bypassesthe reverbsignaland allowsonly the dry signalat the outputs. Any S PS T ty p e f o o t s wi tch(su ch a s th e re ve r bfootswitchthat willworkfor thisfunction. comeswithamplifiers) sometimes Operation ll is easyto usein almostanyapplication.Simply MICROVERB do thefollowing: 1. Applya signalto eitherthe leftinputjackfor mono(usedwith or bothleftand rightjacksfor stereo. a singleinstrument), 2. Increasethe Input controluntilthe ReCLED brieflylights "green" on occasionalprogrampeaks.The LED should remain most of the time. This indicatesthat there is sufficientlevelto maintaina goodsignalto noiseratio. 3. Increasethe Output controluntilthere is sufficientoutput level. 4. Adjustthe Mix controluntilthe desiredratioof dry to wet s i g n a l i s a c h i e v e d . R E M E M B E R :l n c a s e s w e r e t h e MTCROVERBlt is used with the aux sends of a recording console,the Mix controlshouldremainallthe way to the right (ail wet signal). 5. Selectyourprogramof choice. A s a g o o d r u l e o f th u mbfo r se l e cti n gp rogr ams,r hythm ic withostinato(quickly instruments suchas drumsand instruments repeating)type patternsusuallywork bestwith smallerprograms. Long melodiclines and pads generallysound betterwith larger rooms.Remember,however,that thisis only a startingpoint. Use your ears and selecttheprogramthatsoundsbest to you! ll in your studio Howto use MICROVERB The 16 programsin MICROVERBll offer a wide rangeof ambientspaces.lts compact,atfordableformatmeansthat even the smallest4 trackstudiocan own morethan one MIGROVERB ll. One of the greatestdifferencesbetweenhomerecordingsand 10 MICROVERBYI contd top flightrecordproductions is in the qualityand numberof high performancereverb processors.Simply stated,the big studios havea lot of digitalreverbsand the smallerstudiosusuallydon't. MICROVERB ll changesail that. Theillustration showsa typicalreverbassignment for a no hotdsbarredrecordproduction.whilethissetupmaynotrepresent thecapabilities of yourownrecording efforts,it doesillustrate whymodernrecordings soundsospaciouianddramatic.Th6 16bitprocessor in MlcRor/ERBII allorvsyoutocreatethissenseof spacewithcrystallineclarityandgreatresolution. Theseprogramswerechosenfor the purposeof creatinga 'soundstage'for the performance. musical Thereisa welldefinedsenseof threedimensional spacethatis occupiedbyeachinstrument: leftto rightandfrontto back.Theblocksintheillustration indicatethe physicalplacementof eachinstrument, and the spreadingof the sound dueto the psychoacoustic imagingcharacteristics of eachprogram.Noticethatthe smallprogramshavemoreof a centeredspatialimagewhilethelargeprogramsare wider,moreopenandspacious. Recornmended progralrsare listedby numbernelitto each instrument. Theseprogramsuggestions arebasedoncurrentpopularusesof digitalrwerb,butuseyor imagF ption_q1dpleaseexperiment. Musicalstyle,personaltasteandcreativityare1rcurguid-elines.Thismix usesI MlcRovERBII programssimultaneously. Theattoroaoifity ot MICROVERB Ileasilybringsatleasta portion ofthismixwithin thereachofa//studios. Themixcontrolsettingsapplyto eitherthemixcontrolon MICRoVERB II lor stand aloneoperation, or thesettingscan applyto thesendsand receivesof a mixingconsole.IMPoRTANT! whenusedwiththesendsandreceives of a mixingconsolethbmix controlon MIORoVERB II shouldalwaysbe setfullyclockwise, andthereturnson the consolepannedhardleftandrightforthefullstereoeffect. UIXCONTROL PROGRAT SNAREDRUM . LEAOVOCAL BACKGROUNDVOCAIS ..... %Dty %h GATEIoT2 . . . . . . . . M E D I U M 4 O R L A R G E6 10 .. MEDIUMs LEAD INSTRUMENTS (guitiar,sax, svnth, etc.) LARGE1 RHYTHMGUfTARANDKEYBOARDS... .. SMALLlor2 HORNSECTION...,, STRINGS PERCUSSIONANDCYMBALS. .ARGE2 LARGE 1 LARGEl OR .. MEDIUM 2 BASSGUITAR... SMALL2 H1H4T............. S M A L Lo Tr 2 11 so-o 50-100 40-50 50-10() Mtffi I I.IIfiNTil ^- W - Rcldrlr dcFr otttp Soundd{p(afurcdon l-l o* I.-,' I *tr dwcudy nh reUoild d.ill ot ltvub pogrrn} Thewithof €dlHod<rcprcen0stplefr btit*sbr€oi.ttEFg.Thefiontbbad( dimersirn d each blod( representsfre rclalirreserce cf deptt ct€aied by €a.tl HHT3ffiffiS'#ffi.ffi'ffiffi mbqwtidrbdePedentmthe MICROVERBYI cont,d STACKINGMICROVERBils lf 16 programsaren'tenough,try stacking2 MrcRovERB ils togetherfor a nearlyendlessnumberof revbrbpossibilities. Try startingwitha small Roomfeedingintoa Mediumor LargeRoom, then let yourimagination runwild.See ligure 5 FIGURE5. STACKINGMICRoVERBIIs TO CONSOLE ORAMPLIFIER t l I rcrr oureur | | RIGHTOUTPUT *#ffih-a "@:.@:-.@i*'6j@ / \ / FROM MIXER OR INSTRUMENT N 13 \ / \ S-_, I MICROLIMITER' R OulPUI POWEN r-\ \-/ svrc { \ ) ,/ \ L { ,/ ) "f&1R'"?tPS:^"'l"r 4#F *"?r+HilFAmUi'A:tr BACK Description T h e Al e s i s M I CR OL IMIT E Ri s a tru e ster eoin/ster eoout whichis usedfor automaticgain riding,peak compressor/limiter limiting,and specialeffectson bothliveand recordedinstruments andvocals. A compressor/limiter, whichcan be thoughtof as an automatic fader,veryquicklyreducesgainand attenuates the signalonceit level.The numberof dB increaseof the exceedsa predetermined inputsignalneededto causea 1 dB increasein the outputsignal is calledthe compression rafio.Thus,for of the compressor/limiter a ratioof 4 to 1, an 8 dB increaseof inputproducesa 2 dB increasein output. when The MICROLIMITERcan be thoughtof as a compressor ratio(2:1 the greenLEDs are lit becauseof the low compression is usuallyusedto even out the volume to 8:1).A compressor for special fluctuations instrument of an or vocaland sometimes effects(SeeApplications). ratioof 10:1or abovechangesthe compressor A compression intoa limiter.A limiteris usedto preventshorttermpeaks(which add littleinformation to the programmaterial)from overloading amplifiersor tapes. lt also can be used for certaintypesof specialeffects(See Applications). Once the yellowLEDs are fired,the unitbecomesa truelimiterwiththefourthLEDindicating 14 MICRO LIMITER@contd a compression ratioof about16:1.sincewe at Alesisfeelthatthe MICRO LIMITERis more easily and quicktyset up by just listening,we have eliminatedthesedesignations from the front panelof the unit. The MICROLIMITERemploysthe "soft-knee"approach,which meansthat there is alwayssome compressionappliedto all signals,regardlessof level,but the compressionratiois very low for low level signalsand automatically increasesas the signal fevelincreases.See figure 6 FIGURE6 5 F l o I N P U TL E V E L The MICROLIMITERalso employsprogramdependentattack timewhichallowsthe unitto be moremusicalsoundingthanother compr e s s o r / l i m iteorsn th e ma rke t.B e causeof the unique charact e r i s t i cosf i ts d e te cti o nci rcu i try which , have been especiallytailoredfor use with a rhythmsection,the unit can be thoughtof as a "powerbox",addingpunchto bass and drums with very few of the undesirable side effectsnormallyassociated withcompressor/limiters. Unlikemany other compressor/limiters on the marketwhich requireextensivetechnicalknowledgefor operation,the MICRO LIMITERwas designedspecifically withthe musicianin mindso it is bothquickand easyto use and requireslittletrainingto achieve the desiredresults. Controls The input controlsets not only the level enteringthe MICRO LllllTER, but alsodeterminesthe the amountof limitingwhichwill be applied.Therefore,the more inputto the unit, the higherthe 15 MICRO LIMITER@cont'd compressionratio. This ratio is indicatedby the input LED'sin withthe graphon the frontof the unit. conjunction The releasetime controldetermineshow quicklythe limiter recoversfrom a signalappliedto the input. Farthestto the left is the fastestreleasetimewhilefull to the rightis the slowest. The output controlis providedfor matchinglevelsso that no signallevelis lostdue to the effectsof limiting. An in/out switchallowsyou to bypassthe MIGROLIMITERfor comparisonpurposes,if necessary. Operation Althoughspecificoperationof the MICROLIMITERwill vary per instrumentor effect desired,basic operationof the MICRO LIMITERis the same. First,applya signalto the unit'srightor left inputjack (or bothjacksfor stereo),takingcare to use the same sidefor the output. Depressthe in/out switchto the "in" position. To determine the rightamountof limiting,it is bestto lookat the meterson your consoleor tape machineand listento the results. This is coveredmore in the next section(see application). Be awarethat too much limitingwill causethe programmaterialto seemdullandlifeless. Next,adjustthe releasetime by startingwith the controlfull to This is the mostcriticaladjustmentso the left (counterclockwise). it must be made carefullyfor best results.As a generalrule, signalsthat are percussiveor have a high treblecontent(like drums)shouldhave a shorterreleasetime, or the controlset more to the left. Programthat containsa lot of low frequencies (likebass)shouldhavea longerreleasetime,or the controlset moreto the right. Careshouldbe takenwhenthe releasecontrolis set too far to the left (releasetime too short) as this setting may result in a MICRO LIMITER@contd slightamountof harmonicdistortion.Also,a phenomenacalled "pumping"or "breathing" mightoccur.This meansthat if a rapid successionof peakswerefed intothe limiter(a staccatoguitaror synthpart,for instance),the limiterwouldrespondto eachpeakof the signal,causinga rapidrisein background noiseas the gainis increasedafter each peak. Both of these conditionsare a byproductof the limitingprocessand can occurwith any limiter. However,theseconditionsmay neveroccurduringyour particular use as they are dependent on the typeof instrument fed intothe MICROLIMITER,and the styleof musicplayed,as well as the settingof the release control.Simply turn the release control a bit to the right and either the slight distortionor "pumping"and "breathing"willgo away! lf the releasecontrolis set too far to the right(releasetime too long),the programmay sounddull and lifelessas a resultof squasheddynamics. Whenin doubtas to how to setthe release control, it'sbetter to keep it on a shortersetting(towardsthe left) since fhe MICROLIMITERis most forgivingin operationat this point and you will mostlikelyget the desiredresults. Finally,set the output controlby switchingthe in/out controlin, then out, and adjustthe output controluntilthe levelis the same regardlessof the positionof the switch. Application The MICROLIMITERcan be made to performseveraldifferent functions, depending uponcontrolsettings. Theseare: 1. Even out the volume differencesbetweenregisterson instruments. An exampleof this wouldbe that some bass guitar stringsare louderthanotherson someinstruments. The useof a MICROLIMITERproducesa smootherbassline by matchingthe volumesof the differentnotes. 2 . M i n i m i z et h e c h a n g e si n v o l u m ew h e n a v o c a l i s to r instrumentalist momentarily changeshis distancefromthe mike. 17 MICRO LIMITER@cont'd 3. Allow an instrumentto be recordedhotteronto tape by preventingtransients(highlevelpeaks)frompinningthe meter. "sit" better in the mix by 4. Make a vocal or instrument decreasingthe signalpeaks and increasingthe lower volume parts.This actuallyenablesthe signalto be made significantly the overallsignallevelmeter louderin the mix whileincreasing onlyslightly suchas bassor 5. lncreasethe "punch"of certaininstruments drums,by allowingthe peak portionof the signalthroughwhile limitingthe rest. suchas electricguitar 6. lncreasethe sustainof an instrument range. its dynamic compressing by by controlling 7. Stopdistortiondue to temporaryoverloading transients. In the examplesbelow,we can bypassthe normaltechnical explanationsby simply watchingthe meters and listening. This will get you the best resultsfrom your MICROLIMITERwith the leastamountof hassle. MICROLIMITERfor addingpunchto an instrument Adjustthe input controluntil the instrument(or instruments) beginsto brightenon the attackportionof the signal. This should be at aboutthe first red LED. Be carefulnot to limitthe signaltoo much as it will start to becomevery dull and lifeless. Also, be carefulas to the settingof the Releasecontrol(Remember:more bass = longersetting).The MICROLIMITER,unlikeany other limiteron the market,is optimizedfor rhythmsectionwork (bass and drums) allowingyou to add the maximumpunch while sideeffectsto a minimum.See figure 7 keepingundesirable 18 MICRO LIMITER@cont,d FIGURE7 F R O MI N S T R U M E NOTR M I X I N GC O N S O L E T O A M P L I F I EO RR M I X I N GC O N S O L E L E F TI N P U T t MICROLIMITERfor addingsustainfor electricguitar Adjustthe Input controluntil the instrument',snaps"on the attackportionof the signal.Now increasethe Releasecontrol untilthedesiredamountof sustainis achieved(thismaybe all the way to the right). Seefigure I FIGURE8 GUITAR T OA M P L I F I E O R R M I X I N GC O N S O L E LEFrf'rpur ] An unfortunate by-product of the increasedreleasetime is that the noiselevelwillgraduallysurgeto a highlevelwhenno signal is present. This may be overcomeby insertinga MICROGATE afterthe MfCROLIMITERto eliminatethe noise.Seetigure g 19 MICRO LIMITER@cont'd FIGURE9 GUITAR LEFTINPUT LEFTOUTPUT TOAMPLIFIEROR MIXINGCONSOLE Anotherpossibleby-productof increasedreleasetime is thatthe input s i g n a l m a y b e co med u l l d u e to fa ct that the MICRO LIMITERcontinuesto hold on to a note while the next one is pla y e d ,w h i c h p r e ve n tstra n si e n tsfro m makingit thr ough. However,with the additionof a MICROENHANCERafteryour MICROLIMITERand MICROGATEyou have the perfectsetup for long,sustainingguitar!*e figure 10 20 MICRO LIMITER@cont,d FIGURE1O GUITAR LEFTINPUT TOAMPLIFIEROR MIXINGCONSOLE MICROLIMITERfor controlling level of an instrument or vocal Withthe in/out switchin the "out"position,watchthe VU or level meter,and/orlistento the differencesin volumebetweennotes. The VU or levelmeterwill show a largeamountof movement. NowswitchIrllCROLIMITERintothe circuitand beginto increase the Input controluntilthe notesallsound relativelythe same,and the levelmeteris reactingless wildly to the signal.The meter shouldbe movingsomewhat, sinceif it staysin one positionthen it wouldbe an indicationthat the signalis becomingoverlimited 21 MICRO LIMITER@cont'd andwilllackdynamics. Now adjustthe Releaseand Output controlsas in the section markedoperation.Seetigure 11 As a guide,onlythe firstthreeor four LEDs shouldbe lit during thisapplication. F I G U R E1 1 MICROPHONE OR MIXINGCONSOLE INSTRUMENT. ,-*r*- 1 TOAMP OR MIXINGCONSOLE LEFTOUTPUT Whenset up in this manner,the MICROLIMITERwill act as a veryeffectivepeaklimiter.This meansthat the MICROLIMITER c a n b e u s e d t o sto p a n y d i sto rti o nfro m occur r ingin any subsequenteffectsstages(any devicepluggedin after it) due to overload.The MIGROLIMITERperformswell in this application which becauseof its "softknee"signaldetectioncharacteristics, meansthat the higherthe signalpeakis, the morelimitingthere willbe. 22 MICROGATE' FRONT POWEN u o v 'vrc ?RGGER ( R OUTA'' r ( ) ( \*_-,/ \_/ \_/ ALE^s.ls_co^BpoFAIoru --a-.815 LOSANGELES.CA. ilioe,luse L R ) ( NruT L .-\ ) ( \_/ \, *#f*Effi.#ffff *turE*FsNEL o iLTx BACK Description The Alesis MICROGATE is a true stereoin/stereoout noise gate.As the namesuggests,a noisegate is sort of an electronic fence gate. When there is enoughpressureon the gate (the signalis loudenough),the gatewillopento letthe signalthrough. You can controlhow much level it will take to open the gate (or how muchpressure),how longthe gate will stay open,and how fast it will close.Becauseof this amountof control,the MICRO GATEcan be set to eliminate any noises,clicks,or buzzeswhich mightbe a componentof the signalby closingthe gate (turning off) eitherwhen a signalis not present,or whenthe signaldrops belowa presetthreshold(or pressure).The MICROGATEwill not actuallyeliminateall noisethat is a component of the signal,just the noisethat existswhenthe signalis not present.This is true of anygatingdevice. It can alsobe usedfor a varietyof specialetfectssuchas gating the reverbon a snaredrumto achievethe popular80'sstyledrum sound effect,or tighteningup the sound of a live drum kit by suppressing leakagebetweendrummics. 23 MICRO GATEtcont'd Controls The Thresholdcontrolsetsthe pointat whichthe MICROGATE will open(letthe signalthrough).Turningthis controlclockwise(to the right)lowersthe thresholdpoint,makingthe gate easierto trigger. The Rate controldetermineshow fast the MICROGATE will close,with the fastestpositionbeing all the way to the right (clockwise). Thiscan alsobe thoughtof as a releasetimecontrol. A Delay controlallowsthe user to determinehow long the MICROGATEwill wait beforeclosingaftera signalhas dropped belowthe threshold. A series of coloredLEDs are also includedto indicatethe current status of the MICRO GATE. A red "Close" LED indicatesthat the gate is closedand no signalis beingallowed through. A green "Open" LEDindicates the the gateis open, havingrisen above the thresholdpoint,and signal is flowing freely throughthe unit.The yellow"Delay"LEDindicates thatthe signal has dropped below thresholdand the MICROGATEis waiting for a period of time (determined by the delaycontrol) beforeclosing. An ExternalTriggerinputcan alsobe foundon the rearpanel. This inputis sometimescalleda "key"input.The functionof the ExternalTrigger input is to allowthe MICROGATEto open by beingtriggeredfroma sourceotherthanthe one pluggedintothe inputs.An exampleof this is whenan instrument track(suchas a keyboard),whichhas beenplayedwith impreciserhythm,can be tightenedup and the track savedby triggering(or "keying")from whichwas playedwith moreprecisetime. ln anotherinstrument this case,the outputof the snaredrumtrackis pluggedintothe Trigger Input of the MICROGATEwhichthen has the keyboard track pluggedinto its normalinputs.Everytime the snare drum hits, the gate will open allowingthe sound of the keyboard throughin perfectsync. The lengthof time that the keyboard stayson will be determinedby adjustingboththe Rateand Delay 24 MICRO GATEtcont'd controfs. Seefigure 12 FIGURE12 KEYBOARD TRACK SNARETRACK nrxeur I rnrooe An In/Out switchis providedto bypassthe MICROGATE if purposes. desired,or for comparison Operation After connectingyour MICROGATE (referto the sectionon installation), makesure that the unit is readyfor operationby makingsurethatthe in/outswitchis depressed.Thisis important sincethe status LED'swill flash even if the gate functionis bypassed. Whileapplyinga signalto the MICROGATE,turnthe Threshold controlslowlyto the rightuntilthe green"Open"LEDflashes.Now slowlyturn the Rate controlto the rightuntilthe gate turnsoff at the exactmomentthatthe signalstops.Thisadjustment is critical sincethe signalwillsound"chopped" if settoo far to the right,and not enoughnoisewill be eliminated if set too far to the left. As a final step,turn the Delaycontrolslowlyto the right(startingfrom full counterclockwise) untilthe smoothesttransitionfrom opento closedgateis achieved. As a generalrule,percussive (likedrums) typesof instruments will requireshorterrates,while sustainingtypes of instruments (likeguitarsor pianos)will requirelongerrates.The Delaycontrol is most usefulfor thesesustainingtypes of programsas it will 25 MICRO GATE@"ont'a "chopped" allowyou to maintainthe signallengthwithoutthe effectwhilekeepingthe noisefloorto an absoluteminimum' "chatter", whichmeansthat Be carefulalsothatthe gatedoesn't noise, clicks,and pops gate spurious is beingtriggeredby the just a bit too low.A cure for causedby the Threshold beingset this is to connecta MICROLIMITERbeforethe gate in orderto true set the signalto a strong,constantlevel.This is especially picked (toms whengatingdrums,whenleakagefromotherdrums willoftencausethe gateto up by the kickdrummic,for instance) openprematurely. Application The MICROGATEis usefulin manyeverydayrecordingand performing Beloware just a few of the mostcommon situations. waysto putthisdeviceto use. Pleaserememberthat the controlsettingswill vary depending used,the styleof musicbeingplayed, uponthe actualequipment The settingsare playingstyleof the musician. and the particular nominallycorrecthowever,and shouldserve as a reasonably goodstartingpoint. MICROGATE with individualinstrumentsor microphones (or "noise The MICROGATEcan be usedas a noisesuppressor gate")with eitherguitars,basses,keyboards,or microphones the MIGRO whenrecording or playinglive.Whenset up correctly, GATEwill turn off at the end of each signalenvelopethereby keepingannoyinghumsandbuzzesout of thesystem. directlyintoeither or otherinstrument Plugthe guitar,keyboard, plug the same Now GATE. MICRO right input of the left or the you must usethe right sideoutput(if you usedthe rightinputthen output)directlyintoeithera mixingconsoleor amplifier. takingcare to set Proceedas in the abovesection(Operation), 26 MICRO GATE@,onra the Ratecontrolto wherethe signalof the instrument or microphone is not"clipped" whenthegatecloses.Seetigurel3 FIGURE13 FROMINSTRUMENT ORMICROPHONE TOAMPLIFIER OR MIXINGCONSOLE LEFTINPUT LEFTOUTPUT MICROGATEwith a mixing console The MICROGATE can also be used to eliminatenoiseand buzzes,and generally"tighten-up"recordedtracks by being pluggedintothe insertsendand returnsof the inputchannelsof a mixingconsole.Se tigure 14 lf the mixingconsoledoes not have insertjacks,or if the insert FIGURE14 ats16122n INSERT SENO INSERT RETURN LEFTINPUT LEFTOUTPUT 27 I MICRO GATE'cont'd jacks are dedicatedto anothereffect,it is possibleto plug the MICROGATE in betweenthe outputsof the tape machineand the tape inputsof the console.See figure 15 Operationis the sameas the aboveexample. FIGURE15 FROMTAPEDECK LEFTINPUI TOTAPEINPUTSOF MIXINGCONSOLE R I G H TI N P U T LEFTOUTPUT RIGHTOUTPUT MICROGATEas a variable decay for MICROVERBll or other reverbs with a MICROVERBll The useof a MICROGATEin conjunction will openup a or any otherreverbwithfixeddecaycharacteristics See ltgure 16 wholenewrealmof flexibility. F I G U R E1 6 MIXINGCONSOLE FROM LEFTINPUT RIGHTINPUT MICROVERB IIOROTHER REVERB LEFTOUTPUT LEFTINPUT RIGHTOUTPUT RIGHTINPUT LEFTOUTPUT MICRO GATE*contd To varythe reverbdecaytime,turn the Thresholdcontrolto the rightuntilthe green"Open"LED is lit, then slowlyturn the rate controlclockwiseuntilthe desireddecaytime is achieved.The "correct"reverbtime is usuallydeterminedby the tempoof the music,and how busythe arrangement is. For example,if many instrumentsuse the same reverb or the parts containfast passageswith lots of 16th notes,the mix will usuallysound muddyand confusedif the reverbtime is too long.ln this case, just turn the Rate controla bit more to the right to shortenthe decaytime,whichwill leavethe senseof spaciousness while lessening the muddiness. The correctlengthwouldbe whenthe reverbof eachsuccessive notediesjust as the nextnotesounds. It's also possibleto createyour own specialeffectgateddrum sounds,as heardon mostcontemporary records.First,selecta largeroomtype program(or any mediumor largeprogramthat soundsgoodto you) on the digitalreverb. The bestprogramsfor this effecthavethe smoothestdecaytails(thegatewill "chatter',if the tail isn'tsmooth).Nowturnthe RatecontrolJar to the rightso thatthe gateclosesabruptly,makingsurethatthe reverblengthis FROMMIXINGCONSOLE L E F TI N P U TT I R I G H TI N P U T FIGURE17 LEFTOUTPUT LEFTINPUT LEFTOUTPUT LEFTINPUT RIGHTOUTPUT RIGHTINPUT RIGHTOUTPUT RIGHT INPUT TO MIXINGCONSOLE LEFTOUTPUT RIGHTOUTPUT MICRO GATE'cont'd notso longas to spilloverontothe nextdrumbeat.Varythe delay controlfor a smootherreleaseif necessary.For an even more strikingeffect,inserta MICROLIMITERbetweenthe reverband the MICROGATE. Seefigure 17 The limitershouldbe set for maximum"punch"settingswith a highdegreeof limiting(at leastthe firstred LEDshouldlight).Set the releasetime startingat about halfway.The objecthere is to set the releasetime (ratecontrol)as long as necessaryto keep the reverb"tail"smooth. MICROGATEusingthe triggerfunctionfor gatedreverb Anotherway to achievea gatedinstrument sound(likea snare drum)witha minimumof gatechatteris to feedthetriggerinputof whilegatingthe the gate with the dry signalof the instrument reverbin the abovefashion.Thisassuresthe ultimatein chatterfree operationas the rate is now controlled by the envelopeof the instrumentitself. Seefigure 18 FIGURE18 FROMAUXSENDSOF CONSOLE LEFTINPUT LEFTOUTPUT R I G H TI N P U T R I G H TO U T P U T TOMIXINGCONSOLE LEFTINPUT LEFTOUTPUT R I G H TI N P U T INPUT TRIGGER DBYSIGNALFROMINSTRUMENT (EXAMPLE: SNAREDRUM) 30 R I G H TO U T P U T MICRO GATEtcontd MICROGATEusing the trigger function for specialeffects Althoughthe MICROGATEtriggerfunctionis usuallyusedfor syncingetfectsbetweentwo instrumentssee figure 19, it can a ls o b e u s e d f o r se ve ra l i n te re sti n gspecial effects and enhancements. The mostcommonof theseis thetuningandfatteningof a drum (a kickdrum,for instance) by addinga lowoscillator toneof about 60hz(i.e.froma synthesizer) to the drumwhichis thensyncedby the MICROGATE. A signalfrom the drum is then appliedto the Trigger inputcausingthe gate to openwhenthedrumhits. The outputof the MICROGATEshouldthenbe mixedback into the drum soundat the mixingconsole.By tuningthe oscillator between40 and 80 Hz, you will be ableto add botha fullness to thedrumas wellas tunethe drumto a specificpitch. F I G UR E1 9 TOMIXINGCONSOLE OSCILLATOR OR SYNTHESIZER L E F TI N P U T DRUMTRACK LEFTOUTPUT TRIGGER INPUT A variationto the abovewould be to injectwhite noisefrom a synthesizerinsteadof an oscillatortone. This would add more snapor "snares"to a snaredrum.*e figure 19 31 MICRO EQ FRONT FOW€F O tu^c AtE:sls^991?gl|loN1Qt ee15 LVO AIIgELEJ, UA. MAOE IN U S A oo. *#EE$gV'€i,€!b"63n,H,"d* SEfuICE 4FSqNEL BACK Description The Alesis MICROEQ is a mono 3 band semi-parametric equalizerwith sweepablefrequenciesand switchablebandwidth controls. Equalization, or EQ, is the abilityto controlthe harmonic bala n c e ,o r t i m bre ,o f a n i n stru me n t,and can be used to compen$atefor frequencydeficienciesin either microphonesor Therearethreedifferent soundequipment. all typesof equalizers, familiarwith. of whichyouare probably The mostcommontypeof equalizeris the Shelvingtype.This is the simplebass and/ortreblecontrolnormallyfoundon stereo systems,guitaramplifiers,etc. The term shelvingrefersto the plateau,or shelf,beginning amplitude at the turnoverpoint(s)(100 Hz and 10kHzin the diagram)and extending to the high(or low) The frequencies end limitof the equalizer. below(or above)the turnoverpointof the shelfare also atfected,but less and lessso the furtherawayfromtheturnoverpoint. Turnover Frequencles MICRO EQ cont'd The secondtype of equalizeris the GraphicEqualizerwhich mostpeoplehaveseenon soundsystems,somehomestereos, and manyguitartype amplifiers. This devicegets its namefrom the fact that the controlsettingsactuallyform a graph of the frequencyspectrum.Whileshelvingequalizers work on broad graphic sectionsof the frequencybandwidth,a equalizeris slight l ym o r es o p h i sti ca teth d a n th e S h e l vingequalizeras it dividesthe frequencyspectruminto sectionscalledbands.See figure 20 FIGURE20 Bands The rangeof frequencies boostedor cut in eachbandis referred to as the bandwidth.This bandwidthis normallymeasuredin musicaloctaves,so on a simplegraphicequalizer containing only 5 bands,each band would have a 2 octavebandwidth,and a graphicequalizer moresophisticated with31 bandswouldhavea 1/3octavebandwidth. Generallyspeaking,a 1l3rdoctaveequalizeris normallyused for room tuningand feedbackcontrolwhile a 1 or 2 octave equalizeris usedfor normaltonalshaping.See figure 21 33 MICRO EQ cont'd FIGURE21 2 Octave 1 Octave 1/3 Octave By far the mostversatileequalizeris the parametrictypesuchas the MlcRo EQ. Whilethe graphicEQ alwayshas a bandwidth that is fixed,the parametricallowsfor the bandwidthto be varied. This meansthat far fewerequalizersectionsare requiredfor sincethe offending eithertonalshapingor feedbacksuppression precisely. manyparametric Although in be dialed can frequencies variablebandwidth,it has been equalizershave a continuously foundthat a switchablebandwidthfromwideto narrowis not only but far easierand fasterto use.Hence,the MICROEQ sutficient is designedwith a bandwidthcontrolswitchablelrom 2 octave (wide)to llzoctave (narrow),and thus is referredto as semi' parametric. Seeligure 22 FIGURE22 2 Octave 1/2Octave 34 MICRO EQ cont'd Controls Mid Freq Level Frgq Select Input Level Freq Width Low Freq Width High Freq Width The lnput controlsets the levelof signalthat is appliedto the MICROEQ. Sinceaddinglarge amountsof equalization can sometimeslead to overloadof the units connectedafter the MICROEQ, the Input controlwill serveto maintaina distortion freesignalby controlling the overallinputlevel. An In/Out switchallowsthe user to bypassthe MICROEe for comparisonpurposes. The Lo Freq Select (the outer ring of the dual concentricknob) alfowsyouto selectanyfrequencybetweenZ0 Hz and 1kHz. The Lo Freq Level (the inner ring of the dual concentricknob) allowsyou to eitherboostor attenuateany frequencyselectedby the Lo Freq Selectknobup to a maximumof +15d8. The Lo Freq Width controlsthe bandwidthcurve to selectthe one best suitedfor your application.With the switchin the "out" MICRO EQ cont'd position,the bandwidthis 2 octavewhile with the switchin the position, is ll2octave. the bandwidth depressed The Mid Freq Select (the outerring of the dual concentricknob) allowsyou to selectanyfrequencybetween250 Hz and 6kHz. knob) The Mid Freq Level (the innerringof the dual concentric by frequency selected you any to eitherboostor attenuate allows +15d8. the Mid FreqSelectknobup to a maximumof to the Lo Freq Width The Mid Freq Width operatesidentically switch. The Hi Freq Select (the outerring of the dual concentricknob) between1.5kand20kHz. allowsyouto selectanyfrequency The Hi Freq Level (the innerring of the dual concentricknob) allowsyou to eitherboostor attenuateany frequencyselectedby the Hi FreqSelectknobup to a maximumof t15dB. The Hi Freq Width operatesidenticallyto the Lo Freq Width switch. The Clip LED lightswhenthe MICROEQ is beingfed too hot a Whenthisoccurs,turndownthe overloaded. signal,andtherefore Inputcontroluntilthe Clip LEDno longerfires. Operation The bestwayto useyourMICROEQ is as follows: 1. Start by turningthe Level controlof the desiredfrequency band(low,mid,or high)tomaximum. with the FrequencySelect knob until 2. Sweepthe frequencies you find the frequencythat you wish to cut. (lf the Clip LED shouldlight,turndownthe Inputcontrol). 3. Now,backoff the Levelcontroluntilthenewamplituderesults in a pleasingsound. MICRO EQ cont'd 4. Depressthe Width switch(lo, mid,or high)to see if the result is moresatisfying in the l12octave(in)positionor2 octave(out). lf youshouldfindthatyou are addinglargeamountsof Ee in all 3 bands,thenthe overalleffectis the sameas simplyraisingthe volumelevel. In thiscase,do thefollowing: 1. Startby turningthe Levelcontrolof thedesiredfrequency band(lo,mid,or high)tomaximum. 2. Sweepthe frequencies withthe FrequencySelectknobuntil you find the frequencythat you wish to cut. (lf the Clip LED shouldlight,turndownthe lnput control) 3. Now,backoff the Level controluntilyou are cuttingthe level insteadof boosting. 4. Depressthe Widthswitch(lo,mid,or high)to see if the result is moresatisfying in the 1/2octave(in)positionor 2 octave(out). As with any signalprocessor,the MICROEe shouldbe used with discretionsince too much EQ, indiscriminately used, can makethe soundworseinsteadof better.Althoughit is a wonderful deviceand will helpyoursounda lot,rememberthat a littlegoes a longway. Belowis a chartthatwill helpyouzeroin on the keyfrequencies of somepopularinstruments. Remember:The chart seruesonly as a startingpoint. Ultimately, you must useyour earsas a guide. Bass Guitar Attack or pluck is increasedat 700 or 1kHz, bottom added at 60 or 80 Hz, string noise at 2.5kHz BassDrum Slapat 2.5kHz,bottomat 60 or 80 Hz,air at 10kHz 37 MICRO EQ cont'ct Snare Fatnessat240Hz,crispnessat 1 to 2.5kHz,bottomat 60 or 80 Hz Hi hat and CymbalsS h i m m e r a t 7 . 5 t o 1 0 k H z , clang or gong sound at about 200 Hz A tta ck a t S kHz, fullness at Toms Piano 24OHz Attack at SkHz,fullness at 80 or 12OHz Body at 24OHz, clarity at 2.SkHz B o d y a t 240H2, clarity at 2.SkHz, b o ttom at 80 or 120H2 Bass at 80 or 12OHz,presence Horns at 2.5 to SkHz,air at 10kHz, honky-tonk sound at 2.5kHz as bandwidth is narrowed, resonanceat 40 to 60hz F u fl n e ss a t 120 or 240 Hz, Floor toms ElectricGuitar AcousticGuitar Voice Harmonica shrill at 7.5 or SkHz Fuflnessat 12OHz,boominess at 200 to 24OHz, presence at SkHz,sibilanceat 7.5kHz,air at12 to 15kHz Fat at 24OHz 38 MICRO EQ cont'd Conga Resonantring at 200 to 240lHz, presenceand slap at 5kHz In summary,the frequencyspectrumcan be dividedup into six importantsections.The followingis de Gar Kulka'sdescription re p rin t e df r o m h i s a rti cl ei n R e co rd i n gEngineer /pr oducer Magazine: 1 . T h e v e r y l ow b a ss b e tw e e n 1 6 and 60 Hz which encompassessoundswhich are often felt more than h e a r d , s u c h a s t h u n d e r i n t h e d i s t a n c e .T h e s e frequenciesgivethe musica senseof powereven if they occur infrequently. Too much emphasison this range makesthe musicsoundmuddy. 2. T h e b a s s be tw e e n 6 0 a n d 2 S O Hz contains the fundamentalnotes of the rhythmsection,so Eeing this rangecan changethe musicalbalance,makingit fat or thin.Too much boost in this rangecan make the music soundboomy. 3. The midrangebetween250 and 2000 Hz containsthe loworder harmonicsof most musicalinstrumentsand can introducea telephone-like qualityto musicif boostedtoo much. Boostingthe 500 to 1000 Hz octave makesthe instruments soundhorn-like,whileboostingthe 1 to 2kHz octave makes them sound tinny. Excessoutput in this rangecan causelisteningfatigue. 4. The uppermidrangebetween2 and 4kHz can mask the i m p o r t a n tsp e e ch re co g n i ti o nso unds if boosted, introducinga lispingqualityinto a voice and making soundsformedwith the lips such as "m", "b", and "v" 39 MICRO EQ ant'd indistinguishable T .o o m u c h b o o s t i n t h i s r a n g e , especiallyat 3kHz, can also cause listeningfatigue. Dippingthe 3kHzrangeon instrumental backgrounds and peaking slightly 3kHz on vocalscan make the vocals audiblewithouthavingto decreasethe instrumental level in mixeswherethevoicewouldotherwise seemburied. 5 . The presencerangebetween4 and 6kHzis responsible for the clarityand definitionof voices and instruments. Boostingthis rangecan makethe musicseem closerto the listener.Adding6dB of boost at SkHzmakesa mix soundas if the overalllevelhas been increasedby 3 db. As a result of this effect, many recordcompaniesand masteringengineersmakea practice of addinga few db of boost at SkHzto make their productsound louder. Reducingthe SkHzcontentof a mix makesthe sound moredistantandtransparent. 6 . The 6 to 16kHzrangecontrolsthe brillianceand clarityot sounds.Too muchemphasisin this range,however,can producesibilanceon vocals. Application Sincethe MICROEQ can be usedwith any electricinstrument or microphonerequiringtonal alteration,here are some generic s u g g e s t i o n as s to se tu p .S i n ce e a ch i nstr umentwill sound differentdue to the uniqueness of the instrumentitself,the typeof musicbeingplayed,the arrangement, and the touchof the player, you must use your ears (and the abovechart)to ultimatelyfind the correctsettings. MICROEQ with Rockmanru The Rockmanruhas becomea stapleof homerecordingstudios thanksto its ease of use and great sounds.When connected directlyinto a console,however,the soundof the Rockmanru doesdifferfromwhatyou normallyhearin the headphones due to 40 MICRO EQ cont'd pr ovide. the t on a l c o l o r a t i o nth a t th e su p p l i e dh e adphones Therefore, ScholzR&Dsuggestthat you makethe followingEQ whengoingdirect. adjustments +3 to +6 at 4kHz +3 to +6 at 500H2 -4 to -6 at 200H2 The MICROEQ providesthe perfectaccompaniment for the RockmanrM, restoring the losttonalqualities thatyou are usedto. Use2 MICRO EQb tor stereo. FIGURE23 - MICRO EO WITH ROCKMANTM FROMGUITAR ROCKMANTM AtEts.s lyHl}GllDriaFRa +-lsnrsda |lrolu O '@;*@rffiH@'hl5 MICROEQ Gonnectedto a RecordingConsole Generally speaking,it is bestto usethe insertjacksof a console when you want to use the MlcRo Ee on an instrument. This allowsfor the individual controlof the signalof just one vocalor instrument withoutusingan aux send,whichcan be betterused f o r s e n d i n gs i g n a lt o e i t h e ra M r c R o v E R B l l o r M l c R o ENHANCER. 41 MICRO EQ cont'd TO RECORDING FIGURE24 - MICROEO CONNECTED CONSOLE SEND INSERT --l atersl622 m N I T RETURN INSERT ll MICROEQ With ReverbsSuch As MIGROVERB bright. Manytimesa reverbsoundis requiredthat is artificially that mightbe The MICROEQ can easilyprovideany coloration follows: your as mix. Connect requiredto enhance FIGURE25 . MICRO EQ WITH REVERB FROMMIXEROR INSTRUMENT rrh4rrEDeol? Es o |IACqOEA '@;=-@='W-,@ ---lf- ourl OR TOCONSOLE AMPLIFIER 42 rao-t-.w,rue ll,oou. @ T-l low MICRO EQ contd MICROEQ In-LineWith Other Effects To restorea loss of high end, whichis sometimesa by-product of effectspedals,the MlcRo Ee should be connectedfirst in series beforeany other etfects.This will ensurethat only the instrument signalis EQedand not any noisefromthe pedals. The exceptionto this is when both a MlcRo LlMlrER and a MlcRo EQ are used at the same time. In this case, the limiter shouldbe firstin linein orderto keepthe signalconstantto all the etfects. FIGURE26 A. MICROEO USEDWITHEFFECTSPEDALS TOAMPLIFIER -l^ FROMINSTRUMENT EFFECT PEDAL EFFECTS PEDAL B. MICROEQANDMICROLIMITER USEDWTH EFFECTSPEDALS t N FROMINSTRUMENT TO AMPLIFIER PEDAL EFFECTS PEDAL MICROENHANCER' FRONT R a) r(r ' ' v ( ryrc ) ( \-/ ^LSS|S aarooaD.rtu LoSANGELES,cA. ) { t \_-/ \__/ - El=!c3 iloeuu se L IiFI't { l \_-/ rcEIS@CffiEW EFSSmTTOUEO $rcEffiI BACK Description The Alesis MICROENHANCERis a stereoin/stereoout device that adds high frequencyinformation(high end) to program materialin a differentway thana normalhighfrequencyequalizer. Unlikemost other equalizers,which boost noise as well as the signal,the MlcRo ENHANCERonly booststreble information when it alreadyexists in the programmaterial,thus addingthe hig h e n d s p a r k l ew i th o u tb o o sti n gn o i se.Also, the MICRO ENHANCERdiffersfrom, and is superiorto, other types of psychoacoustic enhancers on the marketsince others use a distortionprocesswhichis ultimatelyobjectionable. The MIGROENHANGER can be thoughtof as a dynamicsemiparametricequalizer,in a boost only mode, as it is capableof performingmanyof the functionsof a parametric.By varyingthe balancebetweenthe Threshold,Mix, and Bandwidthcontrols,a wide varietyof trebleboostetfectsmay be achieved,all without the additionof any noisenormallyassociatedwith equalizers,or distortionelementsnormallyassociatedwith psychoacoustic enhancers. Controls The Threshold control,in conjunctionwith the multicolored 44 MICRO ENHANCER@,O't,A LEDs, determines the slope,or the way the MICROENHANCER willworkon highand midfrequencies. The Mix controldetermines howmuchhighfrequency information is addedto the signalgoingthroughthe unit. The Bandwidthcontroldetermines howmuchtrebleor mid-range is added to the signal. With the Bandwidth control (all the way to the left),only the very high counterclockwise frequenciesare added; with the Bandwidthcontrolat maximum (all the way to the right)upperand lower midrangefrequencies are addedas well. A n I n / O u t s w i t c h a l l o w st h e u s e r t o b y p a s st h e M I C R O ENHANCER purposes, for comparison if so desired. Operation Afterconnectingyour MICROENHANCER(referto the section on installation), beginby turningthe Thresholdcontrolto the right (clockwise) untilthe red LED lights.Make sure that the In/Out switchhas beenpressedto the "in" positionor the LEDs will not fire. This unit'sLEDs are not your typicalinputlevelindicators, but indicatethe slope,or the way the MICROENHANCERwill workon highand midfrequencies. Thismeansthatthe soundwill differif the thresholdis set so that the first greenLED is lit from the soundwhenthe red LEDis lit.Thisis dueto thefactthatmore highfrequencyenergyis triggeredas more LEDs are triggered (theslopeis altered). Seetigure 27N278 FIGURE27A FIGURE278 BANDWIDTHControlFullLeft BANDWIDTH ControlFullRioht I I )uJ tr E uJ FREQUENCY 45 MICRO ENHANCER@"o,t'a Now beginto turn the Mix controlto the right (clockwise)until the desiredamountof highfrequencyboostis achieved.Youcan thinkof the Mix controlas an amountcontrol,as this is the one that will add the amountof high frequencyboostdesiredto the . signal(orsignals)thatyousendto the MICROENHANCER Now turn the Bandwidthcontroluntilthe desiredbalanceof Startwiththiscontrolall the way highsand midrangeis achieved. to the right(clockwise)or at full bandwidth,and adjustit untilthe instrumentor microphonereachesthe point of greatestclarity. Be careful to avoid adding excessive midrange which will make an instrumentOR vocal sound harsh.See the next sectionfor morespecificapplications. In orderto comparethe enhancedsoundto the originalsound, depressthe ln/Out button. You shouldexperimentwith differentsettingsof the Threshold controland LED indicatorsas the soundwill vary dramatically betweenvarioussettingsof the Threshold,Mix, and Bandwidth controls.Also,don'tbe afraidto drivethe unit hardso as to keep the red LED on all the time as this is whenthe MICRO is operating at its maximum. ENHANCER Application The MICROENHANCERis an extremelyversatiledeviceand may be used in a varietyof applications.Duringrecordingor playinglive,theMICROENHANCER canbe usedas the ultimate, guitars, quietest keyboards,and vocaland and trebleboosteron mics. instrument and helpfulhints. Please Here are just a few possibilities will rememberthat the controlsettings vary dependinguponthe actualequipmentused,the styleof musicbeingplayed,and the particularplayingstyleof the musician.The settingsare nominally 'correcthowever,and shouldserveas a reasonablygood starting point. MICRO ENHANCER@cont'd MICROENHANCER on Guitar FIGURE28 FROMINSTRUMENT ORMIXING CONSOLE TOAMPLIFIEFOR MIXER MICROENHANCER on ElectricBass FIGURE29 FROMII.ISTRUMENT OR MIXINGCONSOLE TOAMPLIFIEBOR MIXER MICROENHANCER on AcousticPiano FIGURE30 FROMMIXINGCONSOLE TO MIXER MICROENHANCER on Vocals FIGURE31 FROMMICROPHONE OR MIXER TOAMPLIFIEROR MIXER 47 MICRO ENHANCER',onra MICROENHANCER on Guitarthrougha RockmanrM The MICROENHANCER restoresthe highendthatis lostwhen plu g g i n gt h e R o c kma n rM d i re ctl yi n to a n am plifieror mixing console.Thisis becausethereis a certainamountof trebleboost providedby the headphones suppliedwiththe RockmanrM that is missingwhenthe headphones are not used.Now you can hear yourguitar/RockmanrM in all its glorywiththe helpof the MICRO ENHANCER.See figure 32 FIGURE 32 L E F TI N P U TI I R I G H TI N P U T ToAMPLTFTER oRMrxER LEFTOUTPUT I I RIGHTOUTPUT MICROENHANCER during mixdown The MICROENHANCER can be usedto add highend sparkle and presencewhen mixing.This is particularly usefulin home recordingformatswherelimitedbandwidthand distortionin the processrobsimportanthighfrequencyinformation recording that givespresence, crispness, andpunchto homerecording efforts. Connectthe leftand rightoutputsof the mixingconsoledirectly to the inputsof the MICROENHANCER, thenplugthe outputsof the MICROENHANCERdirectlyinto the mixdowntape deck. *e figure 33 FIGURE33 48 MICRO CUE AMP FRONT o,eooooo. R INPUT1 L o\lss:91?9l{loN LVO AI\UELE>, UA STEREOUNEOUT F I}IPUT2 L 1Qr eq15 MADE IN U S A *#*13'.8vl3'^f'.'""63f,H36"' S E A V C TO I F S O \ T I . Description T h e Al e s i s M I GR OC U E A MP i s a h eadphoneamplifier equippedwith 2 separateheadphonechannelsand designedto accept up to 2 stereo low level signalsand boost them to a comfortable listeninglevel.These2 separatestereoinputsare c omp l e t ew i t h t h ei r o w n l e ve l co n tro l so n each headphone channeland give you the abilityto mix 2 sourcestogetherfor a widerangeof applications. The MIGROCUE AMP also allowsthe userto chainmultiple unitstogetherto expandthe headphonemonitoringcapabilities of any recordingsetup. Gontrols The Input 1 controldeterminesthe amountof amplification that the signalappliedto the input 1 jack on the back panelwill receive.The left-handInput 1 controldeterminesthe levelfor the Out t headphonejack.The right-handInput 1 controldetermines jack. the levelforthe Out 2 headphone The Input 2 controldeterminesthe amountof amplification that the signal appliedto the input 2 jack on the back panel will 49 MICRO CUE AMP cont'd the levelfor the receive.The left-handInput 2 controldetermines jack. Out t headphone the levelfor the Out 2 tnput 2 controldetermines The right-hand jack. headphone output The MICROCUE AMP features2 separateheadphone jacks,eachwith independent levelcontroloverinputs1 and2. by outputwiththe volumecontrolled Out 1 is a stereoheadphone the leftInput 1 andInput2 controls. Out 2 is a stereoheadphoneoutputwiththe volumecontrolledby the rightInput 1 andInput2 controls. thatthe unitis on. ThegreenLEDindicates The Input 1 Jacks on the backpanelare a stereoiackwhichcan to the stereoauxiliarysendsof a mixing beusedfor connection suchas guitaror inputfor an instrument an as or used console, practicing. keyboardfor private The lnput 2 Jackson the backpanelare a stereojackwhichcan be used for connectionto the stereoauxiliarysendsof a mixing suchas guitaror console,or usedas an inputfor an instrument k e y b o a r df o r p r i va tep ra cti ci n gT. h e In put 2 Jack is also paralleled withthe StereoLine Out Jack for chainingadditional MICROCUEAMPStogether. Stereo Line Out is usedfor chainingadditionalMICROCUE to Input2 is AMP unitstogether. Only the signalapplied availableat the StereoLine Out. Operation yourMICROCUEAMP (referto the sectionon Afterconnecting into eitherOut 1 or simplyinsertyour headphones installation), 1 and/orInput 2 panel, Input the and turn front 2 on the Out MICRO is reached. volume controluntilthe desiredheadphone eitherlow driveanyset of headphones, CUEAMPwilladequately (8 ohms)or high(600ohms)impedance. 50 MICRO CUE AMP contd Please Note: lf you are connecting just one source to your MrcnO CUE AMP, make sure that the unused input control is turnedcounterclockwise(to the left, or off). This wiil preventany unwanted,stray noisesfrombeingheard. Application The Alesis MICROCUEAMP is a convenient and inexpensive time saver,suitablefor numerousapplications. This litilebox will come in handywhereveran extraset of headphonesis need,so don'tlimityourselfonlyto theseexamples. MICROCUEAMP Used For Additional HeadphoneOutputs T h e M I C R O C U E A MP i s p e rfe ctfo r adding additional headphoneoutputsto a system.Beloware severalmethodsto accomplishthis. Femember:The MICROCUE AMp hasstereo input jacks. Therefore, sends I and 2 or main outs must terminatein a stereoplug. FIGURE34 - MICROCUEAMP/CONSOLE INTERFACE A. USINGTHEAUXSENDS AUXSEND1 TO OTHERMICRO CUEAMPS o F*O I v neaopHoues B. USINGTHE MAIN OUTPUTS MAINOUTLEFT STEREOLINEOUT g,@@g HEADPHONES 51 MICRO CUE AMP cont'd GhainingMICROCUEAMPSTogether SeveralMICROCUEAMPSmay be connectedtogetherin order to add an unlimitednumberof headphoneoutputsto a system. Remember: The Stereo Line Out jack is paralleled with lnput 2, so lnput 2 must always be used as the main input when being used in this application. FIGURE35. CHAININGMICROCUE AMPS -t STEREOLINEOUT FROMMIXINGCONSOLE / INPUT2 .48 lrccxD G / -7-t ' \ \ TOOTHER M|CRO cUEAMPS \ . l t-----.---.----- I|NPUT2 aE @@9.@e9" I ,roor*o*r, HEADPHONES MI CR O C U E AMP U se d F o r Qu i e t P r acticing W ith An Instrument MICROCUE AMP makesthe perfectprivaterehearsalmonitor system.Simplyconnectas shownon the next page,turn up the volume,andgo for it! 52 MICRO CUE AMP cont'd FIGURE36. MICROCUEAMPWITHELECTRIC INSTRUMENTS FROMTAPEDECK, DRUMMACHINE, ETC. FROMGUITAROR KEYBOARD rNPUr 1 At.Cs.s lu!c'?fD INPUT2 I AE M, t@@.: -ffiffii oq -p-p- ourz HEADPHONES MI CR OC U E AM P U se d F o r S ta n d -A l oneDr um Machine Programming Manytimesin the middleof a hot session,newdrummachine partsare required. lnsteadof usingup valuablestudiotimefor programming, the MICROCUEAMP can be pressedintoservice for a privateprogramming sessionwhileyour expensivestudio timeis betterusedon otherrecording. FIGURE37 ,a'.gs ALESIS HR-16/HR.168 |!c!r! dE AE '@@.9, -v:w -A^A- \ / / a OUT 2 MICRO CUE AMP cont'd M I C R O C U E A M P U s e d F o r S t a n d - A l o n eS y n t h e s i z e r Programming As in the aboveexample,the MICROCUE AMP is the perfect programming companion devicefor synthesizer situations.Add a M I C R O V E R Bl l a n d y o u h a v e a s t u d i oq u a l i t ym o n i t o r i n g environment to makeyourprogramming a snap. FIGURE39. MICROCUEAMPFORKEYBOARD PROGRAMMING FROM KEYBOARD I lnr At.Ets FllrCHDArcltaDEgt on*-. --.. ",@.@-@%o)ru / \ / \ / \ . 6 _ r l ot@ HEADPHONES 54 SYSTEMSET-UPS FIGURE40 - GUITAROR KEYBOARDS.A (MICROLIMITER to MICROGATEto MICROENHANCER) GUITAR 55 SYSTEMSET.UPS -B FIGURE41 . GUITAROR KEYBOARDS (MICROLIMITER to MICROEQto MICROGATE) GUITAR 56 SYSTEMSET-UPS FIGURE 42. GUITAR ORKEYBOARDS. C (MlcRoLIM|TER to MTCRO EQro MTCRO GATEto MtcRo ENHANCER) LEFTINPUT LEFTOTJTPUT TO AMPLIFIEROR MIXINGCOT,ISOLE 57 SYSTEMSET-UPS FIGURE43 . GUITAROR KEYBOARDS.D ( M I C R O L I M I T E Rt o M I C R O E Q t o M I C R O G A T E MICROVERB llto MICROENHANCER) -t GUTTAR LEFTNPUT o .\__/ f ' ) ' - f ' ) -f' ) !l ,---@ \/ \J ,tVa ^*, INPIT AELEISE OU|PUI r-errotnrur I I rrurur -J.15.1tu8 A=,oi F!E|C3ID ClAr Frc Mts '@;*-@='ffinW;' Lerrorrnn I I urrrurur o o o . MN - usr aos a :\g_,y4_.y4 R€;l-CaA:A ' !,,,o' lerrourrur I LEFTNPUT I o urrourrur IT LEFTI.IPUT 58 l\v SYSTEMSET.UPS FIGURE44. GUITAROR KEYBOARDS. E ( M I C R O L I M I T E Rt o M T C R OE Q t o M T C R OG A T E t o MICROVERB ll to MICROENHANCER to MTCRO CUEAMp) GUTlrAR -1 ' LEFT INRJT oooooo I |€Frcurpur [*r* LEFrqnpur J I LEFTNRJT I LEFrourpur I r-errrrunrr E:{}!G4o€tll.aFB I oooo r-erra,rrnrr I r.lRJTl [,"r-r 59 r*rntopE oEcKoRcor{solE SYSTEMSET-UPS FIGURE45 - with RockmanrM- A (MICROLIMITER to MICROGATEto MICROENHANCER) ROCKMAN RIGHTINPUT ,'t€s's I;GBO !.s!!EP g@..@@@@@O f1 ,r,our INPUTIEIEL LEFTOUTPUT RIGHTOUTPUT LEFTINPUT INPUT RIGHT A€S'=;ICFOG4trE @ O ;, ',i"t o '- z6,_zA,_-A,_; .W---W--NZ- v,*ou, O LEFTOUTPUT RIGHTOUTPUT LEFTINPUT INPUT RIGHT ,aLEsrs;;eFO EfllaffG=P LFITEL o OUTPUT @@@o @ V,r,ou, RIGHTOUTPUT TOAMPLIFIER OR MIXINGCONSOLE 60 SYSTEMSET-UPS FIGURE46 - with Rockmanru- B (MICROLIMITER to MTCRO Ee to MTCRO GATEto MTCRO ENHANCER) a :&xf. n. h d t . - " ' 61 SYSTEMSET.UPS FIGURE47 - with RockmanrM- C (MICROLIMITERto MICROEQto MICROGATEto ll) MICROENHANCER to MICROVERB RIGHTOUIPUT reHTFPUT THTOUIPI'T 62 SYSTEM SET.UPS FIGURE48. GATEDREVERB (MICROVERB ll to MICROLIMITERto MTCRO GATEto MTCRO ENHANCER) FROM MIXINGCONSOTE LEFTINPUT RIGHTINPUT LEFTOUTPUT RIGHTOUTPUT LEFTINPUT RIGHT INPUT LEFTOUTPUT RIGHTOUTPUT LEFTINPUT RIGHT INPUT a'E== ;llGgoclE o ;' o A-.A:i6;" o @ "t*t o t=t 'n ' ou' THRES/./oI-D DELAY RAIE LEFTOUTPUT RIGHTOUTPUT LEFTINPUT RIGHT INPUT ,zx-EsrslleFOEf;|afGEF @@@@ LANEL V,ntow LEFTOUTPUT RIGHTOUTPUT @ TO MIXINGCONSOLE 63 SYSTEMSET-UPS FIGURE49. DURINGRECORDING OR LIVEPERFORMANCE (MICROLIMITER llto MICRO to MICROGATEto MICROVERB ENHANCER) FROMINSTRUMENT OR MIXINGCONSOLE LEFTINPUT A€s=#eBO INPUT RIGHTINPUT lJlllEP NELEASE 6 @.@ @@@@@ OUTPIIf INPU| LA/EL LEFTOUTPUT RIGHTOUTPUT LEFTINPUT RIGHTINPUT A-es|s+lcPoctr, @ e-(t-(t-o.; -\-1"\7'-\-1' ,t9, o cl.osE v f1 ,*,our LEFTOUTPUT RIGHTOUTPUT LEFTINPUT RIGHT INPUT LEFTOUTPUT RIGHTOUTPUT LEFTINPUT RIGHTINPUT RIGHTOUTPUT /A TOAMPLIFIER OR MIXINGCONSOLE For best performancewith the least systemnoise,this is the recommended order for connectingall of the units of the llicro Seriestogether.The settingsare up to you. SPECIFICATIONS MICROENHANCER FREOUENCY RESPONS92OHz to 20kHz DYNAMICRANGE/1OOdB DISTORTION/<.1% THDat lkHz OdB SIGNALLEVELS/-10 DBto +4 dB nominal INPUTIMPEDANCE/IMeg Ohmeachchannel phonejackinputs,2x114" CONNECTIONS/2x114" phonejackoutputs,1x1/8" powerjackinput POWER/9 voltsA.C.5 VoltAmperesexternallransformer BANDWIDTH OF ENHANCED SlGNAUminl2kHzto 20kHzmax2kHzto 20kHz MICROGATE FREOUENCY RESPONSE/2OHz to 2OKHz DYNAMICRANGE/1OOdB ilSTORnONt<.zYoTHDat lkHz OdB SIGNALLEVELS/-10 DBto +4 dB nominal INPUTIMPEDANC9IMeg Ohmeachchannel phonejack inputs,2x1t4-phonejack outputs,1x1/4" CONNECflONS/2x114' phonejacktrigger,1x1/8"powerjackinput POWER/9 voltsA.C.5 VoltAmperesexternaltransformer ATTACKTIM9Ims OPENING TIME/Sms DELAYTIME/min<2ms,max1.5sec. CLOSINGTIME/min<2ms,max2 sec. RELEASEmin20ms,max2.5 sec. MICRO LIMITER FREOUENCY RESPONSS20Hz ro 2okHzr 1 dB DYNAMICRANGUlnput100d8,outputdependent on Ratio DfSTORnONk.2Y"THD at lkHz OdB SIGNALLEVELS/-10d8 to +4 dB nominal phonejack inputs,2xll4 phonejack outputs,1x1/8" CONNECflONS/2x1|4" powerjack input POWER/9 vohsA.C.5 VoltAmperesexternaltranslormer ATTACKTIME/Programdependent 150msto 0.5ms RELEASETlMBmin10ms,max500ms RATIO/I:1to infinity 65 MICRO EQ to ZokHz RESPONSE/20H2 FREOUENCY Freq -- ZoHzto 1kHz,Mkl Freq- 25OHzto 6kHz' FREOUENCYRANGESTLow HighFreq- 1.5kHzto 2OkHz-Allbandst15dB at lkHz OdB DfSTORTIONI<.1"/"THD DYNAMICRANGE/1OOdB phone iack input, lxll4 phonejack oulput, 'lx'l18 CONNECTIONS/Ix1/4' poweriack input voltsA.C.5 VoltAmperesexternaltransformer POWER/9 dB to +4 dB nominal SIGNALLEVELSF10 MegOhm INPUTIMPEDANCFJI MICROCUE AMP to 2okHz RESPONS92OHz FREOUENCY at lkHz 0dB DfSTORTION/<.2Y"THD SIGNALTO NOISERATIO/1OOdB phonejack inputs,2x1/4'phoneiackoulputs,1x1l8" CONNECflONS/2x114" powerjackinpul,2x114' ring-tip-sleeve slereooutputs POWER/9 vohsA.C.5 VoltAmperesexlernaltransformer into600oHMS,260mWinto30 oHMS,95mWinto oUTPUTPOWER/s1omW sOHMS Ohmeachchannel INPUTIMPEDANCE/1Meg MICROVERBII (Dry),15kHz(Reverb) i 2dB RESPONSE/2OkHz FREOUENCY DYNAMICRANGE/9OdB DlSTORTION t .1% (Typicall -10to +20dBVPeak,Output:+8.5dBVPeak(Reverb), SIGNALLEVELS/lnput: Output:+20dBVPeak(Dry) channel,500kOHM,Monolnput INPUTIMPEDANC9IMEGOHMeach SCHEMBI6BitLinearPCM CONVERSION MEMORYR2 Kibbytes PROCESSING SPEED/3MillionOper./Sec. PROCESSOR MatrixedStereo,FulllmagedStereo FORMAT/lnput: SPSTSwitch(notsupplied) DEFEAT/External, Powerindication, Green:SignalPresent,Red: LEVELINUCAnON/Orange: Overload CONTROLS/lnpul Gain,MixRatio,OulpulLevel,Program PROGRAMS/16 lnputs:1/4' Phone,StereoOutpuls:1/4' Phone,Defeal: CONNECnONS/Stereo Phone 1/4"Phone,Power:3.5mm POWEF/9V AC,SVoh-Amperes 66 ALES'S LIMITEDWARRANTY ALEsls OORPORATIONCALESIS') wanants this p.oduct to b€ fr€€ ot d€tec'ts in matefiat and wofimanship for a period ol 90 days lrom the dats ot original retail purchase. rnis wananty ii enrorceaure only by the ofuinal retail purciasor. . . . Io b€ Protected by th:iswananty, the puichaser must.complete and r€tum the endos€d wananty card within 14 days of purchase. Duringths wananty psriod ALESISshall, at its sole and absoluteoption,eithsr repairor replace . . free of charge any prcduct that proves to b€ d€tectiv€ on inspection by AIESS or its autrJrizeo servir:e representative. To obtainwananty s€rvice,th€ purchasermust tirst call or write ALESISat the addressand telephonenumb€rprintedbelowto obtain a ReturnAuthorizationNumberand instructionsconcerning whero lo retum the unit for service. Atl inqukies must be accompanied by a d€scription ol th6 problem. All authorized retums must b€ sent to ALESIS or an authorized ALESIS repair tacility postage prepaid, insured and prop€tly packaged. Proof ol purchas€ must be prosented in the form ot a bitt oi sateicancitted ched< or som€ olher form of positiveproot that the productis withinthe warrantyperiod.ALESISrasorvesth€ right lo update any unit return€d for repair. ALESIS reserves the right to change or improve design ot the prodr,€i at any time without prior notice. This wananty do€s not cover claims for damage du€ to abuse, n€glecl, alteration or att€mptod . repah by unauthorizedp€rsonn€|,and is limit€dto lailuies arisingduring noimal use that ar€ due to defects in materialor workmanshipin ths product. ANY IMPLIEDWARRANTIES,INCLUDINGIMPLIEDWARRANTIESOF MERCHANTABILITY AND FITNESSFOR A PARTICULARPURPOSE,ARE LIMITEDIN DURATIONTO THE LENGTHOF THIS LIMITEDWARRANTY.Som€ statesdo not allow limitationson how long an impliedwarrantylasts,so the abov€ limitationmay not apply to you. IN NO OTHER EVENTWILL ALESISBE LIABLEFOF INCIDENTAL,CONSEQUENTIALOR OTHER OAMAGESHESULTINGFROM THE BREACHOF ANY EXPRESSOR IMPLIEDWARRANW, INCLUDING,AMONGOTHER THINGS,OAMAGETO PROPERTY,DAMAGEBASEDON INCONVENIENCEOR ON LOSS OF USE OF THE PRODUCT,AND, TO THE EXTENTPERMITTEDBY LAW DAMAGESFOR PERSONALINJURY.Some states do not allow the exclusionor timitationof incidental or cons€quential damages, so the above limitation or exclusion may not apply to you. This warrantygives you speciliclegal rights,and you may also nave-otnerrilnis wirich vary from . state to stale. This warranty applies only to products sold and used in th€ United States of America. For wananty informalion in all other countries please reter to your local distriburor. ALESIS 3630 Holdreg€Avenu€ Los Angeles,Calitornia90016 (213) &|6-7924 Your warranty wlll be In effect and you wlll recelve waranty informailon ONLY !F YOU SEND IN YOUR WARRANTYCARD @ AICAIS COi?OnAnOX. tOS ANGELES:36itr Hot(h€dgsAy..riro, Loc Angd.q CA mrG$l LONDON:AlesisCorporation,15 Letchworthpoint. Letchworth.HenlordshireSG6 tND rerq 4022