8.3.7 - only AirPlay 2 supported

[yannig]

I upgraded my old Air from Mojave to Big Sur (11.7.10) and no probs with Youtube, Amazon Music etc to moOde Airplay 2 using the OS system volume to select the Airplay target.

Alas, I can't: I need old apps that don't work on Big Sur.

I think my best option would be to have a 2nd computer with a recent macOs, or a recent iPad.

But maybe it would nevertheless be possible to (re)build the Airplay 1 functionality (although I think that would be beyond my skills).