ESP32-S3 Polysynth Video below so you can hear what sort of sounds it makes! If you want to make a rather nice 6 voice Poly Synth for yourself, or see what is involved in the process, then please carry on reading! I have used some little 8-bit processors in the past to make simple noise boxes and drone synths, but I came to realise that now in 2026 a cheap ESP32-S3 microcontroller and DAC with the right programming could pretty well generate the same sounds as virtually any synth produced in the 80's and 90's, so I set about seeing what I could come up with.. I like synths to look like a synth, lots of knobs and buttons - rather than a large swathe of black metal with a solitary LCD and encoder popped in the middle. I was toying with the idea of seeing if I could make a modern version of the old  Maplin 5600 Synthesizer  as it is well documented, and hasn't got too many features that would be difficult to emulate. It also ticks the box for knobs, switches and buttons. I sta...