# avfoundation
AVFoundation bindings for Rust.
# How to playback MIDI
```rust
let sequencer = AVAudioSequencer::with_engine(&engine);
sequencer.load_from_url(path, );
```
# how to observe parameter changes?
* AUParameterObserver
# how to get a reference to plugin view?
*
# parameter automation
* AUParameterAutomationEvent