The following features are programmed into this sound unit:

• 11 different chuffs, with a maximum chuff rate of 7 chuffs per second
• 20 different sounds are programmed into this sound unit 
• drain cocks venting steam sounds
• this engine's unique automatic bell & ring rate
• 5 different whistle patterns, such as

1 short whistles for "Safe to Disemark?" with some radio chatter

2 short whistles for "Safe to Proceed Forward", some radio chatter

a few different Long-Short-Long whistle patterns

• this engine's unique fast pumping cross compound air compressor
• steam generator whirring sound
  
  Press here for WAV file sound sample: Norfolk & Western #611 4-8-4