
"The Thomas Henry 8038 Audio Generator Page is up here. Its primary purpose is that of a bench generator. It's got a CV input so you can sweep the output. It could also be patched into your synth for synthy fun, though it's not designed to track keyboards. Schematics, parts list, PCB layout, parts placement, panel design, and drill pattern accompany the terse blow-by-blow commentary.
Cheers,
Scott"