RACS (Remote Audio Caching Server) is a distributed, persistent audio cache optimized for time-indexed range queries. It uses a hybrid memory-disk storage model for low-latency ingestion and retrieval, enabling fine-grained access to arbitrary time ranges within large audio archives while minimizing disk I/O.
- Format Conversion — Transcode audio to PCM, WAV, Opus and MP3.
- Time-Range Queries — Retrieve precise audio segments from large archives.
- Caching & Persistence — Hybrid memory–disk storage with LRU caching.
- Programmability — Embedded Guile Scheme interpreter for scriptable server interaction.
- Replication — Basic master-slave replication.
- WAL — Write-ahead log for crash recovery.
RACS is currently in the Minimum Viable Product (MVP) stage. It is under active testing. New features and enhancements will be added in future releases. Feedback is welcome!
RACS is distributed under the RACS Source Available License (RACS-SAL-1.0).
It is free for personal, educational, and non-commercial use. Commercial use requires a paid license. For licensing inquiries, contact sales@racslabs.com.
Install dependencies and build HTML docs with:
pip install sphinx Pygments sphinx-copybutton
cd docs && make htmlOpen docs/build/html/index.html in a browser to view the documentation.
RACS provides client libraries for multiple languages:
- (Python) py-racs — fully usable
- (Rust) rust-racs — fully usable