Ringer Four Quadrant Multiplier DIY synth module

Ringer is a Kosmo format DIY synth module built around the AD633 chip. If you need to you can press it into service as a 2-channel mixer or a voltage controlled amplifier, but what it really is useful for is something like ring modulation — combining two simple waveforms to make a much more complex sound. Git repository: https://gitlab.com/rsholmes/ringer Blog post: https://www.richholmes.xyz/analogoutput/2024-01-08_ringer/ Befaco A*B+C: https://www.befaco.org/abc/ Music: Ringtone by Rich Holmes Analog Output blog, and links to other AO sites, here: https://richholmes.xyz/analogoutput/