diff --git a/audio-player.rkt b/audio-player.rkt
index e301c7c..5796ece 100644
--- a/audio-player.rkt
+++ b/audio-player.rkt
@@ -83,6 +83,7 @@
   )
 
 (define (to-ret-value ret)
+  (displayln ret)
   (if (list? ret)
       (if (null? ret)
           (raise-audio-error 'audio-error "audio-player: no return value, empty list returned")