Update audio processing state: next_index=18

processing_audio_state.json

@@ -18,6 +18,7 @@
     "audio/week07 06 dynamic meshes.wav": "failed",
     "audio/week07 05 dynamic joints.wav": "failed",
     "audio/week07 04 one way of building a muscle pt2.wav": "failed",
-    "audio/week07 03 one way of building a muscle pt1.wav": "failed"
+    "audio/week07 03 one way of building a muscle pt1.wav": "failed",
+    "audio/week07 02 looking at reference.wav": "processing"
   }
 }