GP200 Studio: Guide

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GP200 Studio guide

Everything GP200 Studio can do with a Valeton GP-200, in thirteen sections. GP200 Studio is a free, open-source browser editor and multi-layer loop station for the pedal , no install, no account and no backend, with your presets never leaving your machine.

If you are starting from nothing, read the overview, then connecting your GP-200. If you came here for the looper the pedal doesn't have, go straight to the loop station.

All sections

  1. 01What GP200 Studio doesWhat the app is, what it needs, and what it can do without a pedal plugged in.
  2. 02The pedalboard editorYour signal chain as physical pedals, with cables, a chain strip and stage lighting.
  3. 03Changing & managing pedalsBypass, swap, edit and reorder the effect blocks in the chain.
  4. 04The control deckPatch volume, pan, tempo, live treadle readouts, meters and the session top bar.
  5. 05Patch settings: FX loop, expression & footswitchesThe FX loop, expression pedal mapping and the eight CTRL footswitch assignments.
  6. 06Bulk apply: one patch’s settings across manyStamp one patch’s footswitch layout and volume onto a bank range, or all 256 slots.
  7. 07The loop stationUnlimited phase-locked layers over USB audio, driven from your own footswitches.
  8. 08DrumsA browser drum machine that needs no pedal, plus a remote for the GP-200’s own drums.
  9. 09MIDI remote & device stateA virtual front panel over MIDI CC, and a readout of what the unit reported.
  10. 10Managing patchesAll 256 slots in one searchable list, with per-slot actions and a full ZIP backup.
  11. 11Connecting your GP-200The USB handshake, the firmware check, and how live two-way sync behaves.
  12. 12Importing & exporting .prst filesNative .prst import and export, the same files the official editor writes.
  13. 13Requirements, browser support & privacyWhat it needs, what works offline, and what data never leaves your machine.

Frequently asked questions

Is GP200 Studio free?
Yes. It is free and open source under the GPL-3.0 licence. There is no account, no install and no backend — the code is on GitHub.
Do I need a GP-200 plugged in to use it?
No. Without a device you can still build and edit patches and import or export .prst files. Live sync and saving to the unit need a connected GP-200.
Can GP200 Studio record loops?
Yes. It records the GP-200’s USB audio as a multi-layer loop station with unlimited phase-locked takes, which the pedal’s own single-track looper cannot do.
Can I control the looper without touching the laptop?
Yes. Click the action you want, stomp any GP-200 footswitch, and it is bound. Takeover mode stops that switch changing your sound while the loop station is open.
Can I back up all my GP-200 patches?
Yes. The patch manager bulk-exports the selected bank, or all 256 patches, to a single .zip file. Do this before running Bulk Apply.
Which browsers work with the Valeton GP-200?
Chrome or Edge on any desktop OS, and Chrome on Android. Firefox and Safari do not implement Web MIDI, so they can edit and export files but cannot talk to the pedal.
Does it work on Linux?
Yes — anywhere Chrome or Edge runs, including Linux, which the official Valeton editor does not support at all.
What preset file format does GP200 Studio use?
Native .prst files, byte-for-byte the same format the official Valeton editor reads and writes, so presets move between the two freely.
Do my presets get uploaded anywhere?
No. Everything runs inside the browser tab — there is no account and no server storing your patches. Only anonymous feature-usage analytics are recorded, and Global Privacy Control disables even those.