diff --git a/src/alsa/mod.rs b/src/alsa/mod.rs
index b184fe3..e21f059 100644
--- a/src/alsa/mod.rs
+++ b/src/alsa/mod.rs
@@ -112,6 +112,10 @@ impl Voice {
     pub fn pause(&mut self) {
         unimplemented!()
     }
+
+    pub fn underflowed(&self) -> bool {
+        false       // TODO: 
+    }
 }
 
 unsafe impl Send for Voice {}
diff --git a/src/lib.rs b/src/lib.rs
index 5d8d2d4..93a30be 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -359,6 +359,12 @@ impl Voice {
     pub fn pause(&mut self) {
         self.0.pause()
     }
+
+    /// Returns true if the voice has finished reading all the data you sent to it.
+    #[inline]
+    pub fn underflowed(&self) -> bool {
+        self.0.underflowed()
+    }
 }
 
 impl<'a, T> Deref for Buffer<'a, T> where T: Sample {
diff --git a/src/null/mod.rs b/src/null/mod.rs
index 1b0c0f3..aeb852a 100644
--- a/src/null/mod.rs
+++ b/src/null/mod.rs
@@ -81,6 +81,10 @@ impl Voice {
     #[inline]
     pub fn pause(&mut self) {
     }
+
+    pub fn underflowed(&self) -> bool {
+        false
+    }
 }
 
 pub struct Buffer<'a, T: 'a> {
diff --git a/src/wasapi/voice.rs b/src/wasapi/voice.rs
index f5083e6..ec71af0 100644
--- a/src/wasapi/voice.rs
+++ b/src/wasapi/voice.rs
@@ -301,6 +301,16 @@ impl Voice {
 
         self.playing = false;
     }
+
+    pub fn underflowed(&self) -> bool {
+        unsafe {
+            let mut padding = mem::uninitialized();
+            let hresult = (*self.audio_client).GetCurrentPadding(&mut padding);
+            check_result(hresult).unwrap();
+            
+            padding == 0
+        }
+    }
 }
 
 impl Drop for Voice {