Rithmatic imports decades of Yamaha DX7 sound banks into one fast local library, sends any of them straight to a Korg volca FM2, and lets you build new patches on a six-operator canvas. No account, no cloud, no network at all.
What it does
Single voices, 32-voice bulk banks, .syx and .sys files, even ZIP archives of them. Each voice is converted to a native FM2 program on the way in.
Search, tag, favorite, and sort into collections, with duplicates detected automatically. Thousands of patches stop being a folder of mystery files.
Push a patch to the FM2's edit buffer to play it instantly, or write it to one of the 64 memory slots when it earns a place.
Route the six operators on a node canvas, pick any of the 32 algorithms, shape ratios and envelopes, and hear every change live on the hardware. Full undo/redo.
A built-in FM engine auditions any patch on its own, so you can dig through a bank on the train and arrive knowing what you want.
Capture all 64 programs and 16 sequences into a named backup, and put the whole thing back in one move. A safety net before a gig or an experiment.
Not "we don't sell your data" — there is nothing to sell. The app makes no outbound connections whatsoever. Works in airplane mode, forever.
One library across the desk and the bag. Plug the FM2 into whatever you have with you and every patch is right there.
How it works
Rithmatic reads Yamaha's DX7 voice format — the packed 128-byte voices and 155-byte expanded ones alike — and translates each into the volca FM2's own program format, then speaks USB-MIDI SysEx to the instrument directly. No cloud converter, no intermediate service, no upload step.
Requires a Korg volca FM2 and a class-compliant USB-MIDI connection.