Struct EngineShared 

pub struct EngineShared {
    pub config: EngineConfig,
    pub transport: Arc<Transport>,
    pub panic_flag: Arc<AtomicBool>,
    pub vu_levels: Arc<VuLevels>,
    pub mixer_command_tx: Sender<MixerCommand>,
    pub track_handles: Vec<Arc<TrackHandle>>,
}

The core audio engine. Lives on the audio thread.

The engine is split into two parts:

• EngineShared: read from any thread (transport, config)
• EngineAudio: owned by the audio callback (synth, MIDI receiver)

Fields

config: EngineConfig

transport: Arc<Transport>

panic_flag: Arc<AtomicBool>

vu_levels: Arc<VuLevels>

Real-time VU meter levels from the audio thread (master bus).

mixer_command_tx: Sender<MixerCommand>

Send commands to the mixer (add/remove tracks, set instruments).

track_handles: Vec<Arc<TrackHandle>>

Per-track handles for UI to read VU / write mute/solo/arm/volume.

Implementations

impl EngineShared

pub fn new(config: EngineConfig) -> Self

pub fn with_command_tx(config: EngineConfig, tx: Sender<MixerCommand>) -> Self

Create shared state with a specific command sender (for wiring to a mixer).

pub fn panic(&self)

Trigger a panic — kills all sound on next audio callback.