Update audio processing state: next_index=19

processing_audio_state.json

@@ -15,6 +15,7 @@
     "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 02 looking at reference.wav": "processed"
+    "audio/week07 02 looking at reference.wav": "processed",
+    "audio/week07 01 intro what do muscles do.wav": "processing"
   }
 }