Thanks for the information.
I've been getting a bit behind the times with technology recently. This is surprising to me as I used to enjoy keeping abreast of developments in audio/visual matters.
The Bluetooth route was chosen as it seemed to be the easiest. It's probably a good place to start.
Anyway, with a bit of luck 2022 will bring further understanding in matters such as Raspberry Pi / streamingDAC hats (?) etc.
Not to mention unravelling some of the mysteries of Linux and the Dark Web. I get confused too easily nowadays.
Now what was that about ducks and onion browsers...?