A rewrite in rust of [cavacore].
```rs
use cavacore::{CavaBuilder, Cava, Channels};
let mut cava = CavaBuilder::default()
// feed cava with some samples
let mut new_samples: [f64; 3] = [1., 2., 3.];
let mut bars = cava.make_output();
// and let it give you the bars
cava.execute(&new_samples, &mut bars);
```