# toppingctl: reconstructing Topping DAC control over USB HID

> toppingctl implements local control of Topping DACs through USB HID reports derived from observed WebHID traffic and the vendor web bundle. The CLI addresses registers for volume, gain, power and parametric EQ, while companion scripts read settings, inspect unsolicited meter data and probe unknown values. The author reports hardware confirmation on the DX5 II.

- 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/gjcourt/toppingctl>
- Primary source: <https://github.com/gjcourt/toppingctl/blob/011bec034d0b2a4d20d463bf812028228c26d06a/README.md>
- Catalog page: <https://awesomerea.org/resources/toppingctl-case/>
- Record JSON: <https://awesomerea.org/resources/toppingctl-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/toppingctl-case/index.md)

## Requirements & limits

- **Prerequisites:** Python 3.11 or newer, the hid package and the hidapi shared library.
- **Testing evidence:** A supported Topping DAC; hardware confirmation is reported for DX5 II firmware 2.39.
- **Limits:** D90 III Discrete and DX1 II mappings are unverified and require --unverified for writes.
- **License:** Apache-2.0 License.

## Primary sources

1. <https://github.com/gjcourt/toppingctl/blob/011bec034d0b2a4d20d463bf812028228c26d06a/README.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.