# Unrack: extending reconstructed t.racks DSP control

> Unrack controls the t.racks DSP 4x4 Mini Pro through WebHID, an Android USB bridge, or an ESP32-S3 Wi-Fi bridge. It builds on earlier protocol research and provides rebuilt transport, state management, and interface code; its protocol notes detail request and reply frames carried in 64-byte USB HID reports, commands, and parameter scaling.

- 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/askz/unrack>
- Primary source: <https://github.com/askz/unrack/blob/41cc12f8e1f0be6c82d24c503ec41a1371ccbbe5/PROTOCOL.md>
- Catalog page: <https://awesomerea.org/resources/unrack-dsp-control-case/>
- Record JSON: <https://awesomerea.org/resources/unrack-dsp-control-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/unrack-dsp-control-case/index.md)

## Requirements & limits

- **Prerequisites:** A t.racks DSP 4x4 Mini Pro is the only currently supported device.
- **Prerequisites:** Desktop use requires Chrome or Edge with WebHID; the Wi-Fi bridge requires an ESP32-S3 board with USB OTG and at least 8 MB flash.
- **Limits:** Mute and PEQ-band bypass have no device readback.
- **License:** AGPL-3.0.

## Primary sources

1. <https://github.com/askz/unrack/blob/41cc12f8e1f0be6c82d24c503ec41a1371ccbbe5/PROTOCOL.md>
2. <https://github.com/askz/unrack/blob/41cc12f8e1f0be6c82d24c503ec41a1371ccbbe5/README.md>

## More in Protocols

- [ArmorX Toolkit: reconstructing ARMORX Pro configuration and control](https://awesomerea.org/resources/armorx-toolkit-case/index.md) · Case study
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- [HT-203U: reconstructing thermal camera capture on Linux](https://awesomerea.org/resources/ht-203u-linux-case/index.md) · Case study
- [Pair-Raught: bridging Steam Controller RF to Switch 2 USB](https://awesomerea.org/resources/pair-raught-case/index.md) · Case study
- [SPORTident SRR: reconstructing the short-range radio link](https://awesomerea.org/resources/sportident-srr-protocol-case/index.md) · Case study
- [Tapo V4: reconstructing C510W local control and media protocols](https://awesomerea.org/resources/tapo-v4-protocol-case/index.md) · Case study

## 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.