Rust bindings for [libkeyfinder](https://github.com/mixxxdj/libkeyfinder) - musical key detection for audio.
```rust
use libkeyfinder_sys::{KeyFinder, AudioData};
let mut audio = AudioData::new();
audio.set_frame_rate(44100);
audio.set_channels(2);
audio.extend(samples);
let mut kf = KeyFinder::new();
let key = kf.key_of_audio(&audio);
```
See [documentation](https://docs.rs/libkeyfinder-sys) for details.
GPL v3 or later.