Initial release: real-time voice changer in pure Rust

Phase-vocoder pitch/formant shifting, 12 presets, effect chain,
noise gate, WAV recording, full-screen TUI (arrow/mouse control)
and a built-in PipeWire/PulseAudio virtual mic (vois.rs).
GPL-3.0-or-later.

src/audio/devices.rs

@@ -0,0 +1,18 @@
+use anyhow::Result;
+use cpal::traits::{DeviceTrait, HostTrait};
+
+pub fn print_all() -> Result<()> {
+    let host = cpal::default_host();
+
+    println!("Input devices:");
+    for device in host.input_devices()? {
+        println!("  {}", device.name().unwrap_or_else(|_| "<unnamed>".into()));
+    }
+
+    println!("Output devices:");
+    for device in host.output_devices()? {
+        println!("  {}", device.name().unwrap_or_else(|_| "<unnamed>".into()));
+    }
+
+    Ok(())
+}