notes

src/main.rs

@@ -1,6 +1,4 @@
 use itertools::Itertools;
-use rustysynth::MidiFile;
-use rustysynth::MidiFileSequencer;
 use rustysynth::SoundFont;
 use rustysynth::Synthesizer;
 use rustysynth::SynthesizerSettings;
@@ -9,43 +7,41 @@ use std::sync::Arc;
 use tinyaudio::prelude::*;
 
 fn main() {
-    // Load the SoundFont.
-    let mut sf2 = File::open("FatBoy.sf2").unwrap();
-    let sound_font = Arc::new(SoundFont::new(&mut sf2).unwrap());
+   // Load the SoundFont.
+   let mut sf2 = File::open("FatBoy.sf2").unwrap();
+   let sound_font = Arc::new(SoundFont::new(&mut sf2).unwrap());
 
-    // Setup the audio output.
-    let params = OutputDeviceParameters {
-        channels_count: 2,
-        sample_rate: 44100,
-        channel_sample_count: 4410,
-    };
+   // Setup the audio output.
+   let params = OutputDeviceParameters {
+      channels_count: 2,
+      sample_rate: 44100,
+      channel_sample_count: 4410,
+   };
 
    // Create the synthesizer.
    let settings = SynthesizerSettings::new(params.sample_rate as i32);
    let mut synthesizer = Synthesizer::new(&sound_font, &settings).unwrap();
 
-   // Play some notes (middle C, E, G).
-   synthesizer.note_on(0, 60, 100);
+   // Play some notes (middle C, E, G). // 16 channels actually // 60=c 64=e 67=g //up to 128velocity though dont go below 50 tbh
    synthesizer.note_on(0, 64, 100);
-   synthesizer.note_on(0, 67, 100);
+   //synthesizer.render(&mut left[..], &mut right[..]); // puts in a state of rendering the first loop of these notes
 
-   // The output buffer
+   // The recycled output buffer per-loop, could be in lamba but that'd be wasteful
    let sample_count = (params.channel_sample_count) as usize;
    let mut left: Vec<f32> = vec![0_f32; sample_count];
    let mut right: Vec<f32> = vec![0_f32; sample_count];
+   // Start the audio output. Executes channel_sample_count per loop, sample_rate/channel_sample_count per second forever.
+   let _device = run_output_device(params, {
+      move |data| {
+         synthesizer.render(&mut left[..], &mut right[..]); // put in a state of rendering the next loop of these notes
+         for (i, value) in left.iter().interleave(right.iter()).enumerate() {
+            data[i] = *value;
+         }
+      }
+   })
+   .unwrap();
 
-    // Start the audio output.
-    let _device = run_output_device(params, {
-        move |data| {
-            synthesizer.render(&mut left[..], &mut right[..]);
-            for (i, value) in left.iter().interleave(right.iter()).enumerate() {
-                data[i] = *value;
-            }
-        }
-    })
-    .unwrap();
-
-    // Wait for 10 seconds.
-    std::thread::sleep(std::time::Duration::from_secs(10));
+   // Let it ride
+   std::thread::sleep(std::time::Duration::from_secs(1));
 }