diff --git a/node-server/assets/muddy_files.html b/node-server/assets/muddy_files.html
index 2c5bf7f..8f51ae7 100644
--- a/node-server/assets/muddy_files.html
+++ b/node-server/assets/muddy_files.html
@@ -43,9 +43,8 @@
       <button id="forward">10s +</button>
     </div>
 
-    <audio id="audio" 
-       src="muddy_files.mp3" 
-       data-reverse-src="muddy_files_reverse.mp3"></audio>
+    <audio id="audio" data-file="muddy_files.mp3" preload="auto"></audio>
+
 
   </main>
 
diff --git a/node-server/server.js b/node-server/server.js
index 4f13c82..97ff2ee 100644
--- a/node-server/server.js
+++ b/node-server/server.js
@@ -62,8 +62,11 @@ io.on('connection', (socket) => {
   const parser = arduinoSerialPort.pipe(new ReadlineParser({ delimiter: '\n' }))
   parser.on('data', data => {
     console.log('got word from arduino:', data);
-    socket.emit('position', data);
-  })
+    const position = parseFloat(data);
+    if (!isNaN(position)) {
+      socket.emit('position', position);
+    }
+  });
 
 });
 
diff --git a/node-server/sounds/muddy_files.mp3 b/node-server/sounds/muddy_files.mp3
new file mode 100644
index 0000000..3463d13
Binary files /dev/null and b/node-server/sounds/muddy_files.mp3 differ
diff --git a/node-server/sounds/paradisev2.mp3 b/node-server/sounds/paradisev2.mp3
new file mode 100644
index 0000000..89ce7a6
Binary files /dev/null and b/node-server/sounds/paradisev2.mp3 differ
diff --git a/node-server/sounds/song_to_song_v4.mp3 b/node-server/sounds/song_to_song_v4.mp3
new file mode 100644
index 0000000..d5fca14
Binary files /dev/null and b/node-server/sounds/song_to_song_v4.mp3 differ
diff --git a/node-server/sounds/stamina-v17.mp3 b/node-server/sounds/stamina-v17.mp3
new file mode 100644
index 0000000..21c1316
Binary files /dev/null and b/node-server/sounds/stamina-v17.mp3 differ