gp200-studio
Hype13/100A browser-based editor, patch manager & loop station for the Valeton GP-200. No install. No account. No backend. Just plug in and play.
gp200-studio is custom firmware for the Valeton GP-200, by @kabir0st. Open source under GPL-3.0, latest release v1.1.0 (August 2026), 28 stars on GitHub.
forValeton GP-200·by@kabir0st
Unclaimed. Is this yours? Sign in with GitHub as @kabir0st to claim it.
No release files yet. Build from source.
GPL-3.0· kabir0st/gp200-studio·gp200studio.com/·downloads come from the creator’s GitHub releases
v1.1.0New Bluk FS Assignment and Other Quality of Life FeaturesLatest0 files
Why this release matters
- Footswitch assignment now actually works
The GP-200 has eight footswitches, and deciding what each one turns on and off is one of the main reasons a player would sit at a computer instead of squinting at the pedal's screen. Until now the app could display those assignments but couldn't reliably write them back, some effect types took, others silently didn't. The cause was a mis-decoded field in Valeton's undocumented USB protocol. We recorded the official Windows editor doing the same action, compared byte-for-byte, and found the value is packed differently than assumed. Now correct, covered by tests, and the "save the patch first" workaround hint is gone. This was the most common source of "the app doesn't work" feedback.
-
Bulk apply. Push one patch's footswitch layout, or a volume, into every patch at once or a chosen bank range, previously up to 256 patches by hand. The official editor does not do this.
-
The pedalboard fits any screen. It used to run off the right edge on smaller laptops; it now scales to the window and wraps onto extra rows.
-
Dark mode, with a stage-lights switch that behaves like real hardware — rebuilt this release to tilt in 3D and click audibly, matching the tactile feel the product is going for. Mutable, and the choice is remembered.