Update audio processing state: next_index=18

processing_audio_state.json

@@ -14,6 +14,7 @@
     "audio/week07 06 dynamic meshes.wav": "processed",
     "audio/week07 05 dynamic joints.wav": "processed",
     "audio/week07 04 one way of building a muscle pt2.wav": "processed",
-    "audio/week07 03 one way of building a muscle pt1.wav": "processed"
+    "audio/week07 03 one way of building a muscle pt1.wav": "processed",
+    "audio/week07 02 looking at reference.wav": "processing"
   }
 }