Page 52 MS-SOUND decoders MS440 to MS990
The load dependency of the sound is based on the current engine load and the acceleration/decelera-
tion.
CV
Denomination
Range Default
Description
#275
Volume
chuff volume
at high speed
without load
0 - 255
220
With this CV the chuff volume can be adjusted
for low speed and “basic load” (same conditions
as during the “calibration run”).
“Calibration run” SW version 5.00 and higher
Here, the engine is driven by about 1/10 of its
full speed, adhering to the exact speed is how-
ever not important.
During this adjustment CV #277 is to be left at
“0” (default), so that the setting for “no-load driv-
ing” is not influenced by load factors.
#276
Volume -
at high speed
without load
0 - 255
220
Like CV #275 (see above) but for driving fast.
Set the speed regulator to maximum during this
set-up.
#277
Dependency of
Volume -
chuff volume
of current load
in
SW version 5.00 and
higher
0 - 255
10
0
=
no
reac-
tion
When deviating from the basic load (as deter-
mined by the “Automated recording of the motor’s
“basic load” factor”, see above), the chuff beat vol-
ume should be increasing (on inclines) or de-
creasing on declines (even muted).
CV #277 defines the degree of change, which
must be set to the proper value by trial.
#278
Load changing
threshold
in
SW version 5.00 and
higher
0 - 255
10
0
With this CV, a change in volume to small load
changes can be suppressed (i.e. in curves) in or-
der to prevent chaotic sound impressions.
Suitable settings can only be determined by trial.
#279
Load changing
delay
in
SW version 5.00 and
higher
0 - 255
1
0
This CV determines how quick the sound reacts to
load changes, whereas the factor is not just time
but rather “load-change dependent time” (= the
bigger the change the faster the effect). This CV is
also used to suppress chaotic sound changes.
Suitable settings can only be determined by trial.
#283
Driving noise-
(Steam chuffs)
Volume -
0 - 255
255
The volume of steam chuffs at maximum acceler-
ation is set with CV #283 (default: 255 = full vol-
ume).
for full
acceleration
sound
If CV #281 = 1 (acceleration threshold set to 1
speed step), the volume defined here is applied
with each speed increase, even if it’s just 1 step.
#284
Deceleration
threshold
for
reduced volume dur-
ing deceleration
0 -255
(internal
Speed
steps)
1
Steam chuffs should be played back at less vol-
ume (or muted) signifying the reduced power re-
quirement during deceleration. The sound reduc-
tion logic is analog to a reversed acceleration (per
CV #281 to #283).
= 1: Reduces sound to a minimum (as per
CV #286) when speed is reduced by just 1 step.
= 2, 3 ... sound reduced to minimum after lower-
ing speed by this number of steps.
#285
Time needed for the
Volume reduction
at deceleration
0 - 255
=
0 - 25 sec
30
After the speed has been reduced, the sound
should remain quieter for a specific time (analog
to the acceleration case).
Value in CV #285 = time in tenth of a second!
#286
Volume -
of reduced
driving noise-
at deceleration
0 - 255
20
CV #286 is used to define the chuff volume during
deceleration (Default: 20 = pretty quiet but not
muted).
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).
NOTE
: The CVs in this chapter affect the sound volume according to load (that is, by how much
the volume should increase at higher loads or decrease at lesser loads, all the way down to mute
if necessary). A possible exchange of sound samples at load increase or decrease is however a
matter of the sound project. There are a few exceptions from this rule, though...
The
default values
listed for the individual CVs are typical guidelines only, as the real values are
defined by the loaded
sound-project
; i.e. a HARD RESET with CV #8 = 8 reinstalls the values
defined by the sound project.
