zetaSID

expandable modular SID synth voice

zetaSID is a powerful eurorack modular synthesizer voice packed into just 4 HP, expandable via midiphy phybus. Start with a single monophonic voice controlled via CV/gate and scale it to a full polyphonic MIDI synthesizer with up to six stereo voices with MIDI control. At its core lies the MIDIbox SID synthesis engine, featuring six LFOs, dual envelopes, quad wave sequencers, eight modulation paths with dozens of sources, algorithmic operations, and an extensive trigger matrix. It ships with 100 carefully crafted patches in its ROM bank, ready to use as-is or as inspiration for your own creations.

Test-drive it in your browser, for free:
https://www.midiphy.com/en/zetasid-emulator/

https://www.midiphy.com/en/zetasid/