- 4 x eoc (end of cycle) pulse outputs corresponding to the 4 function generators.
- VC of attack and decay (with attenuators) of all four envelopes
- 2 x analog or (aka peak circuit) logic outputs that are normalled to the two pairs of envelopes (1+2 and 3+4) with attenuators.
- Special quadrature modes for envelopes 1+2 and 3+4 with jumper on pcb to select two different kinds of looping responses.
- Connects to the Quadra via 4 ribbon cables
32 mA +12V
28 mA -12V
0 mA 5V