quantize note length and pitch

1 files changed, 7 insertions, 2 deletions

diff --git a/src/main.rs b/src/main.rs
index 6b79749..0909b1f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -10,12 +10,17 @@ fn main() {
     let (_stream, stream_handle) = OutputStream::try_default().unwrap();
     let sink = Sink::try_new(&stream_handle).unwrap();
 
+    let bpm = 140.0;
+    let seconds_per_beat = (1.0 / bpm) * 60.0;
+
     loop {
         let mut rng = rand::thread_rng();
-        let freq = rng.gen_range((440 / 4)..(440 * 4));
+        let freq = (440.0
+            * (2f32.powf(1.0 / 12.0)).powf(rng.gen_range((12 * -2)..=(12 * 0)) as f32))
+            as u32;
         let wave = SineWave::new(freq);
         let zero: Zero<f32> = Zero::new(1, 48_000);
-        let length = rng.gen_range(0.1..0.3);
+        let length = (rng.gen_range(1..4) as f32) / 4.0 * seconds_per_beat;
         let source = wave
             .take_crossfade_with(zero, Duration::from_secs_f32(length))
             .amplify(0.20);