Add draft for example music playing

examples/music.rs

@@ -0,0 +1,22 @@
+extern crate cpal;
+extern crate vorbis;
+
+use std::io::BufReader;
+
+fn main() {
+    let mut channel = cpal::Channel::new();
+
+    let mut decoder = vorbis::Decoder::new(BufReader::new(include_bin!("mozart_symfony_40.ogg")))
+        .unwrap();
+
+    for packet in decoder.packets() {
+        let packet = packet.unwrap();
+
+        let mut buffer = channel.append_data(packet.channels, cpal::SamplesRate(packet.rate as u32));
+
+        // FIXME: data loss
+        for (i, o) in packet.data.into_iter().zip(buffer.iter_mut()) {
+            *o = i as u16;
+        }
+    }
+}