Valeton GP180 Reverse Engineering

Goals

• Reverse engineer the SysEx protocol of the Valeton GP180 guitar multi-effects processor.
• Build a platform-agnostic web application (PWA), to manage presets, firmware updates, IR/NAM loading, and settings for the GP180. The application will leverage the WebMIDI API to communicate with the device over MIDI.

Nice-to-haves

• Preset snapshots into git

Non-goals

• Modification of the GP180 firmware or hardware, although hardware extension modules may be considered in the future.

Starting points

Possibly useful prior works:

• Valeton GP5/GP50 web companion
  • If GP5/GP50 use the same/similar SysEx protocol, this could solve a major part of SysEx reverse engineering for the GP150/GP180.
• GP150 preset format analysis
• gp200-studio, a browser-based editor for the Valeton GP200
  • This is roughly what I want to achieve for the GP180, with the added features of IR/NAM loading and firmware updates.
  • Sets the precedent for reverse engineering a Valeton SysEx protocol with Ghidra.

Firmware to analyze (Ghidra):

• GP180 Firmware v1.0.0
• GP180 Firmware v1.1.1

Software to analyze (Ghidra):

• Valeton Suite v2.1.0 for Windows
  • First one to support native NAM A2 lite loading.
• Valeton Suite v2.0.3 for Windows
• Valeton Suite v2.1.0 for Mac
  • First one to support native NAM A2 lite loading.
• Valeton Suite v2.0.3 for Mac

Forum threads with useful context:

• The Gear Forum - GP50,GP150,GP180 discussion
  • All released around Oct 2025, hinting they all share some common design and possibly SysEx protocol.

Other:

• Tone3000 NAM binary loader

Unknowns

• Is the GP5/GP50/GP150/GP180 series SysEx-compatible with the GP200?

Knowns

• GP-200 presents are explicitly not compatible with GP50/150/180.