This is a quick demo of a synth DIY project from Elby Designs, AVR Synth.
The AVR SYNTH is a monophonic synth based designed by Jarek Ziembicki. The synthesis architecture is simple: two DCO’s, a DCF, and a DCA. There is also an LFO and an AR/ASR envelope generator.
It’s available in several DIY and prebuilt options. See the Elby site for details.