wow this sounds weird

src/main.rs

@@ -2,10 +2,12 @@
 extern crate cpal;
 extern crate hound;
 extern crate sample;
+//extern crate signal;
 extern crate sonogram;
 extern crate wavy;
 
 use wavy::*;
+//use signal;
 
 use std::collections::VecDeque;
 
@@ -17,23 +19,42 @@ fn main() {
 fn record() -> Result<(), AudioError> {
   // Connect to the speaker and microphone systems.
   let mut mic = MicrophoneSystem::new(SampleRate::Normal)?;
-  let mut speaker = SpeakerSystem::new(SampleRate::Normal)?;
+  let mut speaker = SpeakerSystem::new(SampleRate::Sparse)?;
 
   let mut buffer = VecDeque::new();
 
+/*  // Convert a signal to its RMS.
+let signal = signal::rate(44_100.0).const_hz(440.0).sine();;
+let ring_buffer = ring_buffer::Fixed::from([[0.0]; WINDOW_SIZE]);
+let mut rms_signal = signal.rms(ring_buffer);*/
+
   loop {
     // Record some sound.
     mic.record(&mut |_whichmic, l, r| {
       buffer.push_back((l, r));
     });
 
+    let mut last_rsample = None;
+    let mut last_lsample = None;
+    
     // Play that sound.
     speaker.play(&mut || {
       if let Some((lsample, rsample)) = buffer.pop_front() {
+        //let rsample = rsample.saturating_mul(2);
+        //let lsample = lsample.saturating_mul(2);
+        last_rsample = Some(rsample);
+        last_lsample = Some(lsample);
+        /*let swap = rsample;
+        let rsample = lsample;
+        let lsample = swap;*/
         AudioSample::stereo(lsample, rsample)
       } else {
         // Play silence if not enough has been recorded yet.
-        AudioSample::stereo(0, 0)
+        //let rsample = last_rsample.unwrap_or(0);
+        //let lsample = last_lsample.unwrap_or(0);
+        let rsample = 0;
+        let lsample = 0;
+        AudioSample::stereo(rsample, lsample)
       }
     });
   }