DS31P Class 31 ProtoDrive Sound Project By Digitrains. This sound project uses the same function key on some
functions to play different sounds depending on whether the loco is stationary or driving. F2 is a working brake key so
this can be used to slow the train quicker, otherwise it will continue to coast for a long period of time before coming to
a stop. F3 and F4 both have speed dependant horns, so the faster you go, the longer the tones. F5 can be used for
two different actions: Cold Start or Light Engine. Before turning on F1, turn F5 on for a Cold Start, if left on then the
loco will act as a Light Engine - This reduces the acceleration and deceleration rates. Light Engine can be turned on at
any time. F7 is a Drive Hold key (Zimo users may know this as SpeedLock); this allows you to lock the train's speed
at which it is currently travelling at. You can then use your throttle to either rev up or down, to simulate pulling a heavy
train uphill or letting the loco coast downhill all whilst maintaining the same speed. Train Mode on F10 turns the red tail
lights off (If separately wired). If your loco ever goes silent, please do check that you haven't turned on F19 as this is a
mute key. To turn the volume up or down F28 is used as a volume cycle.
Decoder type LokSound 5 XL
Address 3
Manufacturer Digitrains
Project number ZS31P O Gauge
Project version V22.06
Key Function Sound slots Volume CVs Volume values
F0 Front light 20, 21 411, 419 160, 160
F1 Engine On/Off 1 259 192
F2 Brake Key 25 451 80
F3 Speed Dependant Horn 2 267 192
F4 Speed Dependant Horn 3 275 192
F5 Light Engine Mode/ Cold Start
F6 Cab Door 19 403 128
F7 Drive Hold
F8 Driving - Rail Clack 12 347 112
F9 Stationary - Radio Driver Checks/
Driving - Flange Squeal
10 331 64
F10 Train Mode 21 419 160
F11 Functioning Hand Brake & Park
Lights
26 459 48
F12 Stationary - Spirax/ Driving -
Sanding
31 499 21
F13 Stationary - Guards Whistle/
Driving - Detonators
28 475 144
F14 Buffer, Couple and Taking Slack 13 355 112
F15 Fan (Also Random) Aux 5 27 467 112
F16 Compressor (Also Random) 9 323 160
F17 AWS Bell 15 371 32
F18 AWS Horn 16 379 32
F19 Fade out sound
F20 Driver Vigilance Device 29 483 96
F21 Two Tone Horn (Directional) 5, 6 291, 299 128, 128
F22 Station Ambience 11 339 200
F23 Air Release (Also Random) 14 363 80
F24 Not in use
F25 Not in use
F26 Not in use
F27 Not in use
F28 Volume Control (5 Step, Left
Turned On = Mute)
F29 Not in use
F30 Not in use
F31
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