# GameTrak Liberation: a client for the controller's HID protocol

> GameTrak Liberation implements a client for the GameTrak controller's reverse-engineered USB HID behavior. It sends the initialization and rolling-key keepalive messages needed for sustained reports, then exposes six-axis data through stdout, OSC, MIDI or WebSockets. Protocol notes, report captures and Processing and p5.js examples accompany the Python tools.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-06
- Original resource: <https://github.com/CreativeInquiry/GameTrak-Liberation>
- Primary source: <https://github.com/CreativeInquiry/GameTrak-Liberation/blob/bc8c2f96c86c15f016939777e9694f1366cb2836/README.md>
- Catalog page: <https://awesomerea.org/resources/gametrak-liberation-case/>
- Record JSON: <https://awesomerea.org/resources/gametrak-liberation-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/gametrak-liberation-case/index.md)

## Requirements & limits

- **Prerequisites:** A GameTrak controller is required for live capture; offline playback accepts recorded JSONL reports.
- **Testing evidence:** The author tested a GameTrak V2.0 unit on macOS 15.6 with Python 3.10 and 3.14.
- **Limits:** The footswitch was unavailable for testing and is unsupported.
- **License:** MIT license.

## Primary sources

1. <https://github.com/CreativeInquiry/GameTrak-Liberation/blob/bc8c2f96c86c15f016939777e9694f1366cb2836/README.md>
2. <https://github.com/CreativeInquiry/GameTrak-Liberation/blob/bc8c2f96c86c15f016939777e9694f1366cb2836/docs/protocol.md>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.