Available as an assembled Module and as a DIY project.
This Module is currently available.
Rectifier
I got around to wanting to explore playing with “Discrete” cross faders and panners via extracting positive and negative voltages from say like a sine wave. This module allows you to input two DC coupled and one AC coupled signals and extract their positive and negative signals via individual positive and negative outputs. Rectify’s inputs have rectifiers built in to each input so it can be used to mix different signals while preserving the polarity difference. Much credit to Michael Barton, for his inspiration as his DIY module came to mind after I began this project!
These merchants probably sell this module. Huh?