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Page 34
CV
Designation
G-scale-Decoder & Sound-Decoder MX695/6/7
Value
Range
INC
Steps
Default
Description
CV
Designation
Load influence
0 - 255
# 280
10
0
for DIESEL engines
= 0: no influence, dependent on motor rpm
up to 255: large influence.
LEIT
- CV
Acceleration threshold for full load
sound
0 – 255
(internal
speed
steps)
1
1
# 281
The “engineer” can in this fashion adjust the
sound (by increasing the speed by 1 step) in anticipation of an imminent incline.
# 285
# 286
LEAD
- CV
# 287
# 288
= 1: Acceleration sound played back at full volume
if speed has increased by just one speed
step.
= 2, 3, ... Acceleration sound played back at full
volume only after increasing speed by
this number of speed steps; before that:
proportional volume.
# 282
Duration of
acceleration sound
Engine sound vo# 283 lume at full acceleration
LEAD
- CV
# 284
Threshold for
deceleration sound
30
0 - 255
=
10
0 - 25 sec
0 - 255
0 -255
(internal
speed
=
3 sec
10
1
255
1
The volume of steam chuffs at maximum acceleration is set with CV #283 (default: 255 = full volume). If CV #281 = 1 (acceleration threshold set
to 1 speed step), the volume defined here is applied with every speed increase (even if increased by just 1 step).
Steam chuffs should be played back at less volume (or no sound at all) signifying the reduced
power requirement during deceleration. The
sound reduction logic is analog to a reversed ac-
Description
celeration (per CV #281 to #283).
Duration of reduced
volume on deceleration
Volume level during
deceleration
Brake squeal
threshold
Minimum driving
time before brake
squeal
0 - 255
=
30
10
0 - 25 sec
=
3 sec
# 289
of
0 - 255
10
20
10
20
0 – 255
(internal
speed
steps)
0 - 255
=
10
50
0 - 25 sec
1 - 255
10
1
0 - 100
10
40
ELECTRIC engines
= 0: no change, pitch remains the same as at
standstill.
= 1- 99: corresponding change in pitch
= 100: pitch doubled already at “medium speed”.
Thyristor control:
for
= 1: no stepping effect, even ascend
Percentage of the increased pitch of the thyristor
sound at medium speed compared to standstill.
Define the “medium speed” in CV #292.
From SW-version
20!
# 291
Note: Brake squeal sounds can also be assigned
to a function key (see allocation procedure CV
#300 = …), with which they can be played manually or stopped!
corresponding speed step interval.
Thyristor control:
Sound pitch at maximum speed
The brake squeal should start when the speed
drops below a specific speed step. It will be automatically stopped at speed 0 (based on backEMF results).
1 - 255: ascending scale according to the
Sound pitch at medium speed
for
If CV #284 = 1 (deceleration threshold set to 1
speed step), the volume defined here is applied
with every reduction in speed (even if decreased
by just 1 step).
The pitch of the thyristor control sound of many
engines (typical example: Taurus) should not ascend evenly but rather in steps.
From SW version 20
# 290
Value in CV #285 = time in seconds x 10
The brake squeal is to be suppressed when an
engine is driven for a short time only. That is
usually a shunting run and often without any cars
(in reality it is mostly the cars that are squealing
not the engine itself!).
ELECTRIC engines
LEAD
- CV
After the speed has been reduced, the sound
should remain quieter for a specific time (analog
to the acceleration case).
CV #286 is used to define the chuff volume during deceleration (Default: 20 = pretty quiet but not
muted).
Thyristor control:
Sound pitch for
stepping effect
The acceleration sound should remain for a certain length of time after the speed increased
(otherwise each single speed step would be audible, which is unrealistic).
Value in CV #282 = time in seconds x 10!
Default
= 1: Reduces sound to minimum (as per CV
#286) when speed is reduced by just 1 step.
= 2, 3, ... sound reduced to minimum after
lowering speed by this number of steps.
It is highly recommended that the automated test
run with CV #302 = 75 is performed first (see text
above under CV #302).
Compared to the “basic load”, more powerful and
louder chuff sounds should be played back for increased power requirements during accelerations. As is the case with the prototype, the increased sound should be noticeable before the
increase in speed becomes visible, since the latter is a result of the increased steam volume
supplied to the pistons. It is therefore practical
that the heavy acceleration sound is played back
when the speed has increased by just one speed
step (when no real speed change is noticed), to
be able to control the proper sound sequence
with the speed regulator.
INC
Steps
steps)
(with “incremental programming” of CV‟s #278
and #279 together).
This CV determines (at least temporarily in SW
version 15) the reaction of the diesel sound to
load: RPM levels and load steps of dieselhydraulic engines cruise/idle rpm of dieselelectrics and
shift points of geared engines.
Value
Range
0 - 100
10
100
Percentage of the increased pitch of the thyristor
sound at maximum speed compared to standstill.
= 0: no change, pitch remains the same as at
standstill.