M.T.H. HO 4-8-8-4 Big Boy Engineer's Manual page 20

F20 – Drift Chuff
To force the Drift Chuff sound in a steam engine, press the F20 button once (enable
F20). As long as F20 is enabled the engine will play its Drift Chuff sounds. To set the
sound back to Normal Chuff press the F20 button again (disable F20).
F21 – One Shot Doppler
You can set your MTH PS 3-equipped engine to simulate the actual Doppler Effect
sound a real engine makes as it passes you. To do this, press the F21 button once
(enable F21) and then listen as the engine makes that pitch shift that mimics the
Doppler Effect perfectly. Press the F21 button again (disable F21) to shut off the
Doppler Effect. With a little practice in timing and speed you can make this happen
right in front of you.
F22 – Coupler Slack
When an engine couples to a train and pulls out, it has to take up the coupler slack.
You can play this sound by pressing F22 twice (toggling on then off). This feature
works two ways – While the engine is sitting still, press F22 twice to enable it.
Then, when you move the engine, it will play the Coupler Slack sound.
The second way is to simply force the sound while the engine is moving. To do this,
simply press F22 twice (toggling it on then off). The sound will play.
F23 – Coupler Close
To play the Coupler Close sound press the F23 button twice (toggling it on then
off). You can play this sound as you're coupling cars together to add realism.
F24 – Single Whistle/Horn Blast
To play a Single Horn Blast press the F24 button twice (toggling in on then off).
This plays a single, short horn blast.
F26 – Brake Sounds
Pressing the F26 button (enable F26) will disable the Brake Sounds for your engine.
The Brake Sounds occur when you reduce the speed of your engine rapidly. To
enable the Brake Sounds press the F26 button (disable F26). Brake Sounds are On
by default.
F27 – Cab Chatter
Cab Chatter occurs when the engine is sitting at idle. There are various times when
the crew will talk to each other when the engine is sitting at idle. Pressing the F27
button (enable F27) will disable the Cab Chatter. Pressing the F27 button again
(disable F27) will enable Cab Chatter. Cab Chatter is On by default.
F28 – Feature Reset
Resets Features to defaults.
M.T.H. HO 4-8-8-4 Big Boy Steam Engine
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