Document "save_utterance" option
The Listener has an option to save the sound that was recognized as a wake-word.   This isn't new functionality, but was previously undocumented.
"url": "https://training.mycroft.ai/precise/upload"
},
+ // Override to save each sound which triggers the wake word engine -- by
+ // default they are only kept briefly in-memory. This can be useful for
+ // for debugging or other custom purposes. Recordings are saved to:
+ // /tmp/mycroft_utterance<TIMESTAMP>.wav
+ // "save_utterance": false,
+
// Override as SYSTEM or USER to select a specific microphone input instead of
// the PortAudio default input.
// "device_name": "somename", // can be regex pattern or substring
