diff --git a/libflac/flac-decoder.rkt b/libflac/flac-decoder.rkt
index 3737df8..ee1d78a 100644
--- a/libflac/flac-decoder.rkt
+++ b/libflac/flac-decoder.rkt
@@ -36,6 +36,7 @@
   (define kinds (make-hash))
   (define last-buffer #f)
   (define last-buf-len #f)
+  
   (define (process-frame handle frame buffer)
     (let* ((h (flac-ffi-frame-header frame))
            (cb-audio (flac-handle-cb-audio handle))
@@ -43,6 +44,7 @@
            (type (hash-ref h 'number-type))
            (channels (hash-ref h 'channels))
            (block-size (hash-ref h 'blocksize)))
+      (hash-set! h 'duration (flac-duration handle))
       (let ((buffers (ffi 'get-buffers buffer channels block-size)))
         (set! last-buffer buffers)
         (set! last-buf-len (hash-ref h 'blocksize))
diff --git a/libflac/flac-definitions.rkt b/libflac/flac-definitions.rkt
index 139ca38..70c01ed 100644
--- a/libflac/flac-definitions.rkt
+++ b/libflac/flac-definitions.rkt
@@ -96,6 +96,7 @@
      [stream-info #:auto #:mutable]
      )
      #:auto-value #f
+     ;#:transparent
     )
 
   ); end of module
diff --git a/play-test.rkt b/play-test.rkt
index 14759c6..561d3d4 100644
--- a/play-test.rkt
+++ b/play-test.rkt
@@ -9,8 +9,8 @@
   (when (eq? os 'unix)
     (set! test-file3 "/muziek/Klassiek-Viool/Alina Ibragimova/Paganini_24 Caprices (2021)/24. 24 Caprices, Op 1 - No. 24 in A minor- Tema con variazioni. Quasi presto.flac"))
   (when (eq? os 'windows)
-    (set! test-file3 "C:\\Muziek\\Klassiek-Strijkkwartet\\Quatuor Zaïde\\Franz\\01 Erlkönig, D. 328 (Arr. For String Quartet by Eric Mouret).flac")
-    ;(set! test-file3 "C:\\Muziek\\Klassiek-Viool\\Janine Jansen\\Janine Jansen - Sibelius en Prokovief 1 (2024)\\02 - Violin Concerto in D Minor, Op. 47 II. Adagio di molto.flac")
+    ;(set! test-file3 "C:\\Muziek\\Klassiek-Strijkkwartet\\Quatuor Zaïde\\Franz\\01 Erlkönig, D. 328 (Arr. For String Quartet by Eric Mouret).flac")
+    (set! test-file3 "C:\\Muziek\\Klassiek-Viool\\Janine Jansen\\Janine Jansen - Sibelius en Prokovief 1 (2024)\\02 - Violin Concerto in D Minor, Op. 47 II. Adagio di molto.flac")
     )
   )
 
@@ -28,6 +28,7 @@
          (bytes-per-sample (/ bits-per-sample 8))
          (channels (hash-ref frame 'channels))
          (bytes-per-sample-all-channels (* channels bytes-per-sample))
+         (duration (hash-ref frame 'duration))
          )
     (when (eq? ao-h #f)
       (let ((fmt (ao-mk-format bits-per-sample rate channels 'big-endian)))
@@ -38,8 +39,14 @@
                               (when (> s current-seconds)
                                 (set! current-seconds s)
                                 (let ((minutes (quotient s 60))
-                                      (seconds (remainder s 60)))
-                                (displayln (format "At time: ~a:~a" minutes seconds))))))))
+                                      (seconds (remainder s 60))
+                                      (tminutes (quotient duration 60))
+                                      (tseconds (remainder duration 60))
+                                      )
+                                (displayln (format "At time: ~a:~a (~a:~a)"
+                                                   minutes seconds
+                                                   tminutes tseconds
+                                                   ))))))))
       (let* ((buf-size (ao-bufsize-async ao-h))
              (buf-seconds (exact->inexact (/ buf-size bytes-per-sample-all-channels rate))))
         (second-printer)