diff --git a/audio-player.rkt b/audio-player.rkt
index 0ce1559..d9b3733 100644
--- a/audio-player.rkt
+++ b/audio-player.rkt
@@ -266,6 +266,7 @@
   (syntax-rules ()
     ((_ handle cmd args ...)
      (let ((rv ((audio-play-rpc handle) cmd args ...)))
+        (displayln (internal-audio-retval-retval rv))
         (if (eq? (internal-audio-retval-kind rv) 'error)
           (raise-audio-error (internal-audio-retval-code rv) (internal-audio-retval-info rv))
           (internal-audio-retval-retval rv))))