diff --git a/src/main.rs b/src/main.rs
index 7483b28..98c297b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -83,5 +83,6 @@ fn main() {
         for i in &mut speakers {
             i.run(&card, &buf);
         }
+        buf = [0i16; BUF_SZ];
     }
 }