I’ve built a full-featured editor for the OB-6 (keyboard and desktop module) that runs straight in your browser, no install and no account. It’s now in open beta and I’d love for fellow OB-6 owners to test it:
Every parameter on screen, with real two-way sync: turn a knob on the synth and the editor follows
Full sequencer editing: 6 voices, 64 steps, ties and rests. The undocumented encoding was reverse-engineered from real hardware and round-trips perfectly
Controls Sequential never published: MPE settings, Vintage mode, Arp Beat Sync and more, captured from the instrument itself. It even corrects errors in the official MIDI docs
Full librarian: all 1000 slots, unlimited browser banks, drag and drop, backup
Everything is verified against my own OB-6, but that’s a sample size of one. That’s where you come in. If anything misbehaves on your unit, the built-in Seq Doctor (Sequencer tab) generates a diagnostic log you can send me at patrik@pistol.se. Bug reports, feature ideas and general impressions all welcome!
Good news on the offline front: the downloadable version is up now. Go to the About page and you’ll find ob6-editor-offline.zip under “Offline and air-gapped studios”. Download it on any machine, copy it to your studio PC, unzip and double-click the start script for your OS. Python 3 is the only requirement (the README explains everything). The editor then runs at http://localhost:8000, fully functional and completely offline, and nothing ever leaves the machine.
On Firefox: you’re right that there is a workaround. Jazz-Soft makes a “Web MIDI API” extension for Firefox (and Safari) that adds the missing API, together with their Jazz-MIDI extension. Some users report it works well. I haven’t tested it with my editor though, and the editor leans heavily on SysEx for patch transfer, so I can’t promise the full experience there. If you try it I’d love to hear how it goes, but Chrome, Edge or Opera remains the safe path.