21 pin Loksound 5 decoder for a Dapol class 21. This is one of our own sound projects with many modern features including playable horns, drive lock and manual brakes. Available with a choice of speaker, we recommend the 25x25x7 megabass speaker. F0 Directional lights on and off F1 Engine on and off F2 High horn (playable) F3 Low horn (playable) F4 Coupling up F5 Manual brake whilst moving, brake release when stationary F6 Cab door open and close F7 Compressor F8 Drive lock F9 Flange squeal F10 Guards whistle (playable) F11 n/a F12 Fan sound F13 Sanders F14 Windscreen wipers F15 Rail clank F16 Station announcement F17 Short horn F18 Double horn F19 Directional cab lights (fade out when moving) F20 Turn off tail lights