Tip-Top Audio

The Roland TR-909 bass drum circuit in eurorack format.


  • Original 909 envelope attack control, extended 909 decay control for more umphhh
  • New controls for the oscillator tuning: Attack tune and Decay pitch envelope- these two will have an effect on each other which makes it really cool
  • Voltage controlled Global Oscillator Tune control
  • Overload knob - might not be everyone's cup of tea, what it does is overload the sine shapers which adds harmonics and some extra punch, it's an aggressive effect.

Add MixZ module to combine and sum multiple Tip Top drum modules via the eurorack power bus-patch cable free!


34 mA +12V
21 mA -12V
0 mA 5V
36 mm deep