Quad Function & Trigger Source

Sputnik Modular

A Buchla 281 inspired module providing four independent or paired (quadrature mode) function generators for creating complex envelopes. An excellent source of voltage controlled AD, AR, or ADSR envelopes, LFOs, clocks, and other complex modulations.


  • 4 generators
  • The time range of each generator (.005 – 10 seconds) can be controlled via CV pulse input jacks for both attack and decay + control knobs
  • 3-mode switch per generator: CYCLE (LFO), TRANSIENT, SUSTAINED


  • Each generator includes CV output + pulse output that generates a transient pulse at the end of the decay segment: if the generator is in CYCLE mode for instance, that cycle will repeat
  • QUADRATURE MODE SWITCH with green LED: when engaged, 1+2 (or 3+4) work in tandem + a shift of 90 degrees to each other. These pairs can then be linked creating complex ADSR envelopes
  • Dedicated outputs for 1+2 and 3+4 as well as attenuator knobs for mixing channels


100 mA +12V
60 mA -12V
28 mm deep