Retrieval of song metadata during (bluetooth) playback
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As far as I can tell, in order to seamlessly transmit music metadata from a BT media source, we would need to set up the AVRCP protocol between the device and the Pi. I have not done quite enough research to know whether this is the most platform-agnostic means (bar building companion apps), let alone whether it will work, but I did notice you did some work with file transfers over BT, so you're probably on a similar page as I am. I was previously under the impression that A2DP was a superset of AVRCP, but I've (thankfully) been corrected -- thankfully, since bluealsa does not appear to support it natively yet.
I may have the time to implement retrieving songnames from music metadata when playing from storage. There may be some trouble if using mp3tag, as in my experience it seems to choke on anything but the most standard ID3 tags; even album art can confuse it.
Alright that's good news you bring be me here, but please do not open issues for it ;-)
it would be great if you want to contribute adding some features, I'll wait for your PR anytime
Closing the issue for the moment..