Add stereo sound example

agb/examples/stereo_sound.rs

@@ -0,0 +1,28 @@
+#![no_std]
+#![no_main]
+
+extern crate agb;
+
+use agb::sound::mixer::SoundChannel;
+use agb::{include_wav, Gba};
+
+// Music - "Let it in" by Josh Woodward, free download at http://joshwoodward.com
+const LET_IT_IN: &[u8] = include_wav!("examples/JoshWoodward-LetItIn.wav");
+
+#[agb::entry]
+fn main() -> ! {
+    let mut gba = Gba::new();
+    let vblank_provider = agb::interrupt::VBlank::get();
+
+    let mut mixer = gba.mixer.mixer();
+    mixer.enable();
+
+    let mut channel = SoundChannel::new(LET_IT_IN);
+    channel.stereo();
+    mixer.play_sound(channel).unwrap();
+
+    loop {
+        vblank_provider.wait_for_vblank();
+        mixer.vblank();
+    }
+}