pub fn subscribe_system_audio_level(handler: impl Fn(f32) + 'static)Expand description
Subscribe to the system-audio-level Tauri event
(M-AUDIO.METER / AUT-287) emitted by the SCK delegate at the
stream’s natural buffer rate (~20-100 Hz). Handler receives an
EMA-smoothed master-stream RMS in [0.0, ~1.0]. Mirror of
crate::mic_ipc::subscribe_mic_level.