# RND Companion: reconstructing the RND Synth SysEx protocol

> RND Companion reconstructs the Cymaforma RND Synth's SysEx control vocabulary and implements a C++ codec and companion plugin for patch seeds. The protocol notes identify framing and seed or status commands from a web app and one hardware capture. The client can use a direct MIDI port or host MIDI routing and stores a curated seed library.

- 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/Enkerli/rnd-companion>
- Primary source: <https://github.com/Enkerli/rnd-companion/blob/f98ebb811974e01970f00e0c4a0dd04557913ac2/docs/PROTOCOL.md>
- Catalog page: <https://awesomerea.org/resources/rnd-companion-case/>
- Record JSON: <https://awesomerea.org/resources/rnd-companion-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/rnd-companion-case/index.md)

## Requirements & limits

- **Prerequisites:** A Cymaforma RND Synth is needed for hardware use and capture.
- **Prerequisites:** Building the full companion requires JUCE and the separate music-suite UI source; codec tests do not require JUCE.
- **Limits:** The wire vocabulary is based on one hardware capture and may change with firmware updates.
- **License:** Unlicense public-domain dedication.

## Primary sources

1. <https://github.com/Enkerli/rnd-companion/blob/f98ebb811974e01970f00e0c4a0dd04557913ac2/docs/PROTOCOL.md>
2. <https://github.com/Enkerli/rnd-companion/blob/f98ebb811974e01970f00e0c4a0dd04557913ac2/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.