rill-io

Audio I/O backends — ALSA, CPAL, PipeWire, JACK.

This crate provides only the hardware abstraction layer. Graph processing is handled by rill-graph::SignalEngine — this crate is purely about backend I/O.

Key components

• AudioBackend trait — common interface for all I/O backends
• Backends (each behind a feature flag):
  • cpal — cross-platform audio I/O via CPAL (default)
  • alsa — Linux ALSA backend
  • pipewire — PipeWire backend
  • jack — JACK Audio Connection Kit backend

Two-thread architecture

Audio processing is separated into two threads:

• Audio thread (hard RT): runs [rill-graph::SignalEngine] which calls process_tick() for clock boundary and process_block() for graph processing. Source/Sink nodes own the I/O buffers.
• Control thread (soft RT): runs PatchbayManager for automata, sensors, and servos. Communicates via CommandQueue/TelemetryQueue.

See rill-graph documentation for details.

Links

• Repository: https://github.com/DigitalRats/rill
• Documentation: https://docs.rs/rill-io