Non-Sound Decoder MX600 - MX634 and Sound Decoder MX640 - MX658 Page 41
This CV assigns a function key with which the driving sounds
can be faded in and out, i.e. when the train disappears behind
scenery. F8 is used by default, which is already the sound
on/off key but now does so softly.
= 0: No mute key or mute function.
= 1…28: Selected function key F1…F28 as mute key.
= 101…128: Assigned function key with inverted action.
Time in tenths of a second for sound fading in/out when mute
button is pressed. Total range is 25 seconds.
= 0 (to 10): minimum time setting of 1 sec.
= 11…255: longer “fade” times
To reduce the driving sound volume (E.g. Diesel motor with
related sounds such as turbo charger) compared to the func-
tion sounds.
The following CV’s can be programmed both “normal” (i.e. CV #... = ...) and “incremental”. “In-
cremental programming” is especially useful when the proper value cannot be calculated in advance
and must be determined by trial, which is often the case with many sound parameters.
The “Lead CV” in each case is the first of a group of 3 CV’s, which are edited and displayed together
on a ZIMO MX31/MX32 cab during the “incremental programming” procedure.
The brake squeal should start when the speed
drops below a specific speed step. It will be auto-
matically stopped at speed 0 (based on back-EMF
results).
Minimum driving time
before brake squeals
The brake squeal is to be suppressed when an
engine is driven for a short time only, which is
usually a shunting run and often without any cars
(in reality it is mostly the cars that are squealing
not the engine itself!).
Note: Brake squeal sounds can also be assigned
to a function key (see allocation procedure CV
#300 = …), with which the brake squeal can be
started or stopped manually!
The volume for background sounds (boiling, brake squealing etc.), function sounds, random sounds
and switch input sounds can be set within the sound selection procedures (see chapter 5.1 The “CV
#300 procedures).
More convenient however is the direct volume adjustment by CV’s (especially when no sound se-
lection is necessary, which is often the case). Of course, not all sounds listed below are part of every
sound project. Changing sound CV values of sound files that are not part of the relevant sound pro-
ject have no effect.
Background sounds - Volume adjustments:
Thyristor sound volume (ELECTRIC engine)
Start whistle/horn volume
Blow-off volume (STEAM engine)
Electric motor volume (ELECTRIC engine)
Switch gear volume (ELECTRIC engine)
Second Thyristor volume (ELECTRIC engine)
Pantograph up volume (ELECTRIC engine)
Pantograph down volume (ELECTRIC engine)
Pantograph stop (down) (ELECTRIC engine)
Turbocharger volume (DIESEL engine)
Dynamic brake volume (ELECTRIC engine)
Note: The CV ahead of the CV’s listed (#573, 575 etc.) contain the sound sample numbers to be played.
Function sounds - Volume adjustments:
Sound volume operated with function key F0
= 0: full volume, original sound sample volume (same as 255)
= 1 .. 254: reduced volume 1 - 99,5 %
= 255: full volume
Volume for function sound F1
Volume for function sound F2
Volume for function sound F3
Volume for function sound F4
Volume for function sound F5
Volume for function sound F6
NOTE: If a decoder comes with a potentiometer for volume control (mostly on large-scale
decoders), the pot meter should NOT be fully opened if full volume is not really desired (Loss of
sound quality if pot meter is fully open and at the same time the volume is heavily reduced by
CV’s!).
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