# douze: SSL 12 USB control protocol and Linux client

> douze reconstructs the Solid State Logic SSL 12 USB control protocol and applies it in a Linux command-line controller and local mixer interface. Its protocol notes and captures cover framing, checksums, gain routing, monitoring, preamps and loopback.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-08
- Original resource: <https://github.com/xenicle/douze>
- Primary source: <https://github.com/xenicle/douze/blob/37149828f12f53a39e67c1290c052300db70b5a2/README.md>
- Catalog page: <https://awesomerea.org/resources/douze-case/>
- Record JSON: <https://awesomerea.org/resources/douze-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/douze-case/index.md)

## Requirements & limits

- **Prerequisites:** SSL 12 hardware and Linux with PipeWire.
- **Prerequisites:** Python 3.11+ and pyusb for the controller and GUI.
- **Limits:** A few settings and clock controls are identified but undecoded.
- **License:** Code is AGPL-3.0; protocol documentation is CC0-1.0.

## Primary sources

1. <https://github.com/xenicle/douze/blob/37149828f12f53a39e67c1290c052300db70b5a2/README.md>
2. <https://github.com/xenicle/douze/blob/37149828f12f53a39e67c1290c052300db70b5a2/PROTOCOL.md>
3. <https://github.com/xenicle/douze/blob/37149828f12f53a39e67c1290c052300db70b5a2/COPYING.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.