The Rumble Module from Teenage Engineering is an expansion module for the OP-Z that primarily generates vibrations. From the sounds generated in the OP-Z, it sets in a frequency range between 10 and 150 Hertz and generates vibrations within this range, which are adjustable in their intensity. Anyone familiar with the "shock controller" of a modern game console will be able to classify the result of holding the OP-Z in your hand while playing kick & bassline respectively composing.
