re. If I enable the 2 repos for your applications and libraries will that install a later version of Qjackctl?
yes, for qjackctl alone you can go with the "Applications" repo only. (eg. ppa:rncbc/apps-focal).
about the stickiness to a 44100 sample-rate I'm afraid I cannot help you much there; what are your evidences that jackd is actually running @44k1 ? please, look into the messages log for clues... try using the jack d-bus interface instead, see if it behaves to the same result... you'll need to install a modern and recent jackd2 for that, I believe, do you have it installed right?
re. If I enable the 2 repos for your applications and libraries will that install a later version of Qjackctl?
yes, for qjackctl alone you can go with the "Applications" repo only. (eg. ppa:rncbc/apps-focal).
about the stickiness to a 44100 sample-rate I'm afraid I cannot help you much there; what are your evidences that jackd is actually running @44k1 ? please, look into the messages log for clues... try using the jack d-bus interface instead, see if it behaves to the same result... you'll need to install a modern and recent jackd2 for that, I believe, do you have it installed right?
hth.
byee