Feature: ChannelRouter

Cargo.toml

@@ -74,3 +74,6 @@ required-features = ["symphonia-isomp4", "symphonia-aac"]
 [[example]]
 name = "noise_generator"
 required-features = ["noise"]
+
+[[example]]
+name = "channel_routing"

examples/channel_routing.rs

@@ -0,0 +1,43 @@
+//! Channel router example
+
+use std::error::Error;
+
+fn main() -> Result<(), Box<dyn Error>> {
+    use rodio::source::{Function, SignalGenerator, Source};
+    use std::thread;
+    use std::time::Duration;
+
+    let stream_handle = rodio::OutputStreamBuilder::open_default_stream()?;
+
+    // let test_signal_duration = Duration::from_millis(1000);
+    let interval_duration = Duration::from_millis(100);
+    let sample_rate = cpal::SampleRate(48000);
+
+    let (mut controller, router) = SignalGenerator::new(sample_rate, 1000.0, Function::Triangle)
+        .amplify(0.1)
+        .channel_router(2, vec![vec![0.0f32, 0.0f32]]);
+
+    println!("Playing 1000Hz tone");
+
+    stream_handle.mixer().add(router);
+
+    for i in 0..1000 {
+        thread::sleep(interval_duration);
+        let n = i % 20;
+        match n {
+            0 => println!("Left speaker ramp up"),
+            1..10 => {
+                _ = controller.map(0, 0, n as f32 / 10.0);
+                _ = controller.map(0, 1, 0f32);
+            }
+            10 => println!("Right speaker ramp up"),
+            11..20 => {
+                _ = controller.map(0, 0, 0.0f32);
+                _ = controller.map(0, 1, (n - 10) as f32 / 10.0);
+            }
+            _ => {}
+        }
+    }
+
+    Ok(())
+}