add samples to doc subfolder.

docs/audio_comarison.md

@@ -176,7 +176,7 @@ Originalaufnahmen aus dem "thorsten" Dataset.
   <tr>
     <td>04</td>
     <td>Euer Plan hat ja toll geklappt.</td>
-    <td><audio controls="" preload="none"><source src="../samples/sample04-vocgan.wav"></audio></td>
+    <td><audio controls="" preload="none"><source src="./samples/sample04-vocgan.wav"></audio></td>
   </tr>
 </tbody>
 </table>