The Tiptop Audio CR909 Cymbals Generator Eurorack Module features original TR-909 crash and ride sound generators that have been adapted specifically for modular synthesizer use. The front panel has all the same controls found on the original TR-909 drum machine, giving you full control over volume levels to mix with other accent levels and drums. In addition, the CR909 Cymbals Generator has added manual and voltage control of each generator frequency.