<!DOCTYPE html><html><head><title></title></head><body><div>Hi,</div><div><br></div><div>On Sun, 15 Feb 2026, at 11:24, Thomas Hudson via Synth-diy wrote:</div><blockquote type="cite" id="qt" style="overflow-wrap:break-word;line-break:after-white-space;"><div>I’m looking for drone synth ideas, whether fully analog or very hands on controllers for something running on a Raspberry Pi, like Super Collider, Sonic Pi, or ChucK. Just looking for ideas to get started<br></div></blockquote><div><br></div><div>there’s a LOT of riffing on the old “CD40106 and 6 pots” idea out there, including (without checking, but a fairly confident guess) the example you shared in your post.<br></div><div><br></div><div>You might also like to look at Nonlinearcircuits’ “Divide and Conquer” circuit.<br></div><div><br></div><div><a href="https://www.nonlinearcircuits.com/modules/p/divide-and-conquer">https://www.nonlinearcircuits.com/modules/p/divide-and-conquer</a></div><div><br></div><div>You should be able to replicate and explore the idea in software with whatever the kids are using these days — Puredata, Max, Strudel, etc<br></div><div><br></div><div>I have an older Eurorack version of it and you can pry it from my cold dead hands.</div><div><br></div><div>Paraphrasing Andrew@NLC’s own description: feed it two rectangle waves at almost-but-not-quite the same frequency and enjoy a constantly-shifting ocean of harmonics. Then filter/EQ to taste, and also adjust pulse width of the source oscillators, and the mix levels of the divider outputs.</div><div><br></div><div>Good way to add some sparkle and fizz.</div><div><br></div><div>John<br></div></body></html>