diff --git a/c_os/user/SoundDemo.cc b/c_os/user/SoundDemo.cc
deleted file mode 100755
index 22cec56..0000000
--- a/c_os/user/SoundDemo.cc
+++ /dev/null
@@ -1,18 +0,0 @@
-/*****************************************************************************
- *                                                                           *
- *                         S O U N D D E M O                                 *
- *                                                                           *
- *---------------------------------------------------------------------------*
- * Beschreibung:    Test für den PC-Lautsprecher-Treiber.                    *
- *                                                                           *
- * Autor:           Michael Schoettner, HHU, 26.10.2018                      *
- *****************************************************************************/
-
-#include "kernel/Globals.h"
-
-void sound_demo() {
-
-    /* Hier muess Code eingefuegt werden */
-    pcspk.tetris();
-    // pcspk.play(440, 1000);
-}
diff --git a/c_os/user/SoundDemo.h b/c_os/user/SoundDemo.h
deleted file mode 100755
index 6ab0605..0000000
--- a/c_os/user/SoundDemo.h
+++ /dev/null
@@ -1,16 +0,0 @@
-/*****************************************************************************
- *                                                                           *
- *                         S O U N D D E M O                                 *
- *                                                                           *
- *---------------------------------------------------------------------------*
- * Beschreibung:    Test für den PC-Lautsprecher-Treiber.                    *
- *                                                                           *
- * Autor:           Michael Schoettner, HHU, 26.10.2018                      *
- *****************************************************************************/
-
-#ifndef __SoundDemo_include__
-#define __SondDemo_include__
-
-void sound_demo();
-
-#endif