Voltage Controlled 4046 Waveshaper module, 100x200 mm, with eight knobs, a switch, and nine jacks

This is a modification of the Barton Musical Circuits 4046 Wave Shaper .

In Barton’s design the seven signals (which are 0, 1, 2, and 3 octaves above and below the input signal) go into a simple mixer with a potentiometer attenuator on each channel to produce the module output. This modification replaces that simple mixer with a voltage controlled mixer, allowing use of control voltages to modulate the mix. If any input has no CV plugged in, the corresponding pot behaves like a signal attenuator.

An additional modification to Barton’s design is that the gain on the output stage can be varied using a pot on the panel.

The module consists of a front panel and three PCBs. One of these is the PCB for the original 4046 Wave Shaper, available from Barton, assembled mostly as designed but with a few things changed. The second is a PCB holding the board mounted pots and switch as well as the parts associated with the voltage controlled mixer and the power input section. The third just holds the board mounted input and output jacks.

Git repo