A1 ESU sound decoder and speaker

Description

F0. Lights on/off (where fitted)
F1. Sound on/off
F2. Long A1 whistle (press once and whistle will sound until pressed again)
F3. Short A1 whistle
F4. Long chime whistle (press once and whistle will sound until pressed again)
F5. Short chime whistle
F6. Injectors
F7. Drain cocks
F8. Safety valves
F9. Guards whistle
F10. Carriage door slam
F11. Coupling up
F12. Buffering up
F13. Air pump