GrooveForge
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About this app
GrooveForge is a small music app for MIDI keyboards and soundfonts.
It isn't a DAW and doesn't try to be one. It started as a practice companion: I wanted a portable way to relearn scales after years away from a piano, and it grew from there.
You build a rack of synths, effects and MIDI processors, stack them in whatever order you like, and save the whole setup. There's a MIDI looper with multi-track overdub, bar-accurate quantization, reverse and speed control. Jam Mode locks the keyboard to a scale, so out-of-scale notes snap to the nearest correct pitch. It's a practice aid, not a teacher.
Beyond the keyboard there's a 32-band vocoder with PSOLA pitch locking and a noise gate, a Stylophone, and a Theremin that can follow your hand through the camera if you want it to. Swipe for glissandos, or move vertically and horizontally for pitch bend and vibrato. USB and Bluetooth MIDI both work.
The microphone is used by the vocoder only, and audio is never stored or sent anywhere. The camera is used only by the Theremin's CAM mode, and no images are saved.
GrooveForge is open source under the MIT license. Built solo, with help from AI pair-programming (mostly Anthropic's Claude Code). No ads, no tracking, no accounts. Expect rough edges.
It isn't a DAW and doesn't try to be one. It started as a practice companion: I wanted a portable way to relearn scales after years away from a piano, and it grew from there.
You build a rack of synths, effects and MIDI processors, stack them in whatever order you like, and save the whole setup. There's a MIDI looper with multi-track overdub, bar-accurate quantization, reverse and speed control. Jam Mode locks the keyboard to a scale, so out-of-scale notes snap to the nearest correct pitch. It's a practice aid, not a teacher.
Beyond the keyboard there's a 32-band vocoder with PSOLA pitch locking and a noise gate, a Stylophone, and a Theremin that can follow your hand through the camera if you want it to. Swipe for glissandos, or move vertically and horizontally for pitch bend and vibrato. USB and Bluetooth MIDI both work.
The microphone is used by the vocoder only, and audio is never stored or sent anywhere. The camera is used only by the Theremin's CAM mode, and no images are saved.
GrooveForge is open source under the MIT license. Built solo, with help from AI pair-programming (mostly Anthropic's Claude Code). No ads, no tracking, no accounts. Expect rough edges.
Expressive MIDI controller & synthesizer with real-time Jam mode and SF2 support
Updated on
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- Committed to follow the Play Families Policy
What’s new
Rehearsals: a new tab where a band learns a tune together, each player recording their own part over a shared click.
Parts sync phone to phone over Wi-Fi. No server, no account, no internet needed.
Xen: lock the keyboard to any of 92 scales, from maqam and raga to 31-EDO, with real polyphonic microtonal tuning.
Four-voice harmonies from both Harmonizers, and a Vocoder Harmony mode that sings your chord back in your own voice.
12 new drum styles.
Parts sync phone to phone over Wi-Fi. No server, no account, no internet needed.
Xen: lock the keyboard to any of 92 scales, from maqam and raga to 31-EDO, with real polyphonic microtonal tuning.
Four-voice harmonies from both Harmonizers, and a Vocoder Harmony mode that sings your chord back in your own voice.
12 new drum styles.
