# OpenHX: rebuilding Line 6 HX preset control over USB

> OpenHX implements selected Line 6 HX and Helix preset controls in a Rust CLI and includes an early GUI. USB captures between HX Edit and an HX Stomp XL informed its bulk-transfer transport, session handshake and preset operations. The published protocol notes cover packet sequences, MessagePack preset data and device quirks.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/allansomensi/openhx>
- Primary source: <https://github.com/allansomensi/openhx/blob/ab8aed4ed4f1430f9b049a4de1d535e849dd1a73/README.md>
- Catalog page: <https://awesomerea.org/resources/openhx-case/>
- Record JSON: <https://awesomerea.org/resources/openhx-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/openhx-case/index.md)

## Requirements & limits

- **Prerequisites:** Building from source requires Rust and libusb 1.0 or later.
- **Testing evidence:** The author reports validation on HX Stomp, HX Stomp XL and Helix Floor; other listed devices are planned.
- **Limits:** Preset renaming, import/export, block reordering and a full GUI editor are listed as planned rather than implemented.
- **License:** MIT license.

## Primary sources

1. <https://github.com/allansomensi/openhx/blob/ab8aed4ed4f1430f9b049a4de1d535e849dd1a73/README.md>
2. <https://github.com/allansomensi/openhx/blob/ab8aed4ed4f1430f9b049a4de1d535e849dd1a73/docs/protocol/README.md>
3. <https://github.com/allansomensi/openhx/blob/ab8aed4ed4f1430f9b049a4de1d535e849dd1a73/LICENSE>

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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.