# OpenChirp: reconstructing the Chirp audio protocol

> OpenChirp reconstructs the Chirp data-over-audio protocol in an Android transmitter and receiver example. Its notes describe the frequency alphabet, payload and header frames, and Reed–Solomon error symbols, with an Octave walkthrough of the encoding.

- Type: Case study
- Targets: Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-08
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/cawfree/OpenChirp>
- Primary source: <https://github.com/cawfree/OpenChirp/blob/8d21eb545c16d2de8ed606c42d7c0e61b4682cf7/README.md>
- Catalog page: <https://awesomerea.org/resources/openchirp-audio-protocol-case/>
- Record JSON: <https://awesomerea.org/resources/openchirp-audio-protocol-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/openchirp-audio-protocol-case/index.md)

## Requirements & limits

- **Prerequisites:** The Android example depends on zxing-core and tarsosdsp.
- **Scope:** The implementation is an Android example.
- **License:** Apache-2.0 licence.

## Primary sources

1. <https://github.com/cawfree/OpenChirp/blob/8d21eb545c16d2de8ed606c42d7c0e61b4682cf7/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.