I built a Mutable 6-voice Ambika synthesizer about five years ago with the SMR voice cards. It is a magical synth and an easy build. You can get DIY kits from T

I built a Mutable 6-voice Ambika synthesizer about five years ago with the SMR voice cards. It is a magical synth and an easy build. You can get DIY kits from TubeOhm. https://www.tubeohm.com/tubika.html https://www.tubeohm.com/tubika.html