Well, there is good news and bad news. The bad news is that I can't get 6.4.2 to work at all; the good is that 6.3.0 is actually working OK. The original "no sound" issue has proved to be a poor connection. I hadn't realised that Bluetooth is a very short range / low power system. My RPi is housed in a HiFiBerry steel case which works fine on wifi but seems to attenuate a Bluetooth signal too much. Doh! I feel a bit silly now, but at least I've learned something.
I shall wait for 6.5 rather than trying to fix 6.4.2, and find a different housing. Pity, because the HiFiBerry one is smart.
Thanks / regards
Richard
I shall wait for 6.5 rather than trying to fix 6.4.2, and find a different housing. Pity, because the HiFiBerry one is smart.
Thanks / regards
Richard