Download User Manual - Alto Professional

1. INTRODUCTION
Thank you very much for expressing your confidence in
Preamplifier/Voice Processor with digital outs .
LTO products by purchasing our VOICE plus D MIC
With the VOICE plus D, you will acquire an extremely useful MIC Preamplifier/ Voice Processor which is based on
many years of experience and findings in amplifier and processor technology and is used throughout the world in
renowned studios, sound reinforcement systems as well as in broadcast and television studios. The VOICE plus D
meets the highest and non-compromise requirements in terms of operation, sound, specifications and workmanship.
The VOICE plus D provides you a more natural and musical sound: eliminating interference signals, smoothing out
the overall signal dynamics, compensating deficiencies in the sound image and removing unwanted frequencies etc
he switchable +48V Phantom Power supply allows you to operate condenser microphone more conveniently. It also
includes a sophisticated 24 bit digital output interface with SPDIF connector for transmitting digital audio signal. We
believe the VOICE plus D is your perfect choice for enhancing the performance of any console or digital audio workstation
2. FEATURE LIST
Mountable in one standard 19" rack unit.
Providing +48V phantom power for MIC input stage
Smart compressor for precision, limiting signal peaks and dynamic processing
Voice optimized EQ is responsible for voice reinforcement
De-essor for eliminating the hiss and unnecessary vocal
High quality parts and rigid configuration for long life and full credibility
3. CONTROL ELEMENTS
3.1 The Front Panel
INPUT LEVEL(dB)
GAIN REDUCTION(dB)
-12 0 +12 CLIP
30 25 20 15 10 6
PHANTOM
3
OUTPUT LEVEL(dB)
-24 -18 -12 -6
1
+14
0
+2.5
-10
0
-2
R
LINE
10
-12
60
+12
dB
GAIN
-30
255
18
15 Hz 360
FREQUENCY
0%
PHASE
INPUT
-12 -6
0
+6 +12 CLIP
ABSENCE
-6
90
LTO
OUTPUT LEVEL(dB)
ACTIVE
LIM
0 +6 +12 +18
LOW CUT
23
0
100%
VINTAGE
TUBE EMULATION
+18
+20
dBu
THRESHOLD
10
2
-40
+10
N:1
RATIO
COMPRESSOR
+20
dB
OUTPUT GAIN
+2
+20
+8
OFF
dBu
THRESHOLD
0
+2
-12 dB +8
PRESENCE
6K2
330
-3
+2 220
460
4K6
0
-5
-12
-3
+2
+5
600
0
3K1
-12 dB +8
WARMTH
VOICE OPTIMIZED EQ
130 Hz 720
TUNING
BYPASS
ACTIVE
VOICE plus D
8K6
10K
+5
-6
-6
-8 dB +8
BREATH
0
BYPASS
ACTIVE
-3
+4
-4
-20
1
SMART
-10
0
MIC PREAMPLIFIER/
ON VOICE PROCESSOR
OFF WITH DIGITAL OUTS
+6
-8
-15
2K7 Hz 12K
CUT FREQUENCY
-20
5
dB
DE-ESSER
+10
BYPASS
ACTIVE
dB
MASTER VOL.
POWER
1
Your VOICE plus D provides with convenient operation interface and excellent performance. You can easily find
the six sections from the interface: input section, Tube Emulation , Compressor section, Voice optimized EQ section,
De-esser section and Master Vol. Section. For more detains, please refer to the following description.
1. POWER Switch
Turn the apparatus ON or OFF.
3.1.1 INPUT Section
8
5
2
INPUT LEVEL(dB)
-12 0 +12 CLIP
PHANTOM
LOW CUT
23
90
0
R
LTO
255
18
10
-12
LINE
60
+12
dB
GAIN
15 Hz 360
FREQUENCY
PHASE
INPUT
4
3
4
6
7