“The SWTP Psych Tone is a vintage kit from 1972, based upon the Triadex MUSE Box. It is a note pattern generator, minimal synthesizer controls like Attack and Decay and fixed tone filters. Would be great repackaged as a part of a modular synthesizer. This kit is scraggly wiring inside but mostly works. It has a small quiet speaker but I run it with audio jack out into an amp or mixer. ” Click here to search for synths on eBay