diff --git a/examples/music.rs b/examples/music.rs
index 6c39305..7276666 100644
--- a/examples/music.rs
+++ b/examples/music.rs
@@ -33,7 +33,7 @@ fn main() {
                     };
 
                     if let Some(output) = buffer.next() {
-                        *output = next_sample as u16;
+                        *output = next_sample;
                         data = &data[1..];
                     } else {
                         break;
diff --git a/src/alsa/mod.rs b/src/alsa/mod.rs
index d720a1c..ce7889e 100644
--- a/src/alsa/mod.rs
+++ b/src/alsa/mod.rs
@@ -50,7 +50,7 @@ impl Voice {
     }
 
     pub fn get_samples_format(&self) -> ::SampleFormat {
-        ::SampleFormat::U16
+        ::SampleFormat::I16
     }
 
     pub fn append_data<'a, T>(&'a mut self, max_elements: usize) -> Buffer<'a, T> where T: Clone {
diff --git a/src/wasapi/mod.rs b/src/wasapi/mod.rs
index 0939807..35d3ecc 100644
--- a/src/wasapi/mod.rs
+++ b/src/wasapi/mod.rs
@@ -40,7 +40,7 @@ impl Voice {
 
     pub fn get_samples_format(&self) -> ::SampleFormat {
         match self.bits_per_sample {
-            16 => ::SampleFormat::U16,
+            16 => ::SampleFormat::I16,
             _ => unimplemented!(),
         }
     }