Usually audio is over standard Bluetooth - not Bluetooth LE. Nordic do have some examples of audio over Bluetooth 5 (which is faster) but it's not hifi audio or anything.
Realistically I've only seen low-res images sent over BLE (for instance the Parrot Rolling Spider drone).
I'm not sure I understand about that stuff you posted - are those modules any different to the things I use for Puck.js?
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