diff --git a/src/bin/example.rs b/src/bin/example.rs
index 371fa37..f2f763f 100644
--- a/src/bin/example.rs
+++ b/src/bin/example.rs
@@ -87,7 +87,9 @@ impl MyEmulator {
         let mut audio_spec = None;
         let audio_device = audio
             .open_playback(None, &desired_spec, |spec| {
-                println!("audio format {:?}", spec.format);
+                if spec.format != AudioFormat::S16LSB {
+                    println!("unsupported audio format {:?}", spec.format);
+                }
                 audio_spec = Some(spec.clone());
                 MySdlAudio {
                     audio_spec: spec,
@@ -254,13 +256,10 @@ impl AudioCallback for MySdlAudio {
     type Channel = i16;
 
     fn callback(&mut self, out: &mut [Self::Channel]) {
-        match self.audio_spec.format {
-            AudioFormat::S16LSB | AudioFormat::U16LSB => {
-                if let Ok(samples) = self.audio_receiver.recv() {
-                    out.copy_from_slice(&samples[..out.len()]);
-                }
+        if self.audio_spec.format == AudioFormat::S16LSB {
+            if let Ok(samples) = self.audio_receiver.recv() {
+                out.copy_from_slice(&samples[..out.len()]);
             }
-            _ => {}
         }
     }
 }