diff --git a/cmd/client/main.go b/cmd/client/main.go
index aa1bcfe..8b0606e 100644
--- a/cmd/client/main.go
+++ b/cmd/client/main.go
@@ -192,8 +192,8 @@ func main() {
           panic(err)
         }
         data := make([]byte, written*2)
-        for i, p := range(pcm) {
-          binary.BigEndian.PutUint16(data[i*2:], uint16(p))
+        for i := 0; i < written; i++ {
+          binary.BigEndian.PutUint16(data[i*2:], uint16(pcm[i]))
         }
         speaker <- data
       }