# linux_voice_test

Purpose: prove a Linux-native voice loopback path that enumerates input/output
devices and can target PipeWire or PulseAudio directly instead of relying on
`cpal`'s generic ALSA path.

Scope:
- enumerate Linux capture and playback devices through PipeWire or PulseAudio
- open a selected input and output device pair
- run local microphone-to-speaker loopback at 48 kHz mono f32

Out of scope:
- Chanora product integration
- Opus encode/decode
- jitter buffer, per-user playback controls, or persistent settings
- packaging and service lifecycle

Current validation:
- `cargo check` succeeds on the Fedora-based host after isolating the PoC from
  the workspace with a local `[workspace]` table
- `pkg-config --modversion libpipewire-0.3` and `pkg-config --modversion
  libspa-0.2` both succeed on that host; `pipewire-0.3` is not the correct
  module name
- `cargo run -- --list-devices` succeeds and lists real PipeWire devices on the
  host

Reproduction:

```bash
cd poc/linux_voice_test
cargo check
cargo run -- --list-devices
cargo run -- --backend pipewire --input 0 --output 0
```

See `VERIFICATION.md` for the exact commands and observed results captured in
this repository session.