Often one would like to assign a sound to a movement in the model & perform both functions at the same time. To reduce the hardware to a minimum we have developed as a supplement to the sound module 23 42 19-62 a plug on hardware which allows it to control sound-synchronously up to 3 engines & 2 additional switch functions directly on the sound module. Thus it is possible to combine, e.g., lifting & lowering of a crane with appropriate clank of chain. Depending on how the sound module is headed, the connected engine with suitable noise turns to the right or on the left.