New comment by daniel-eys on void-packages repository

https://github.com/void-linux/void-packages/issues/20051#issuecomment-598990967

Comment:
Right, this restricts the group `users` to limit memlock to 1024KB.
But you said your memlock limit is still at 64. (which is definitely the issue here)
I'm not really sure why jack.conf is not properly picked up and setting memlock to unlimited. :/
Are you able to manually `ulimit -l unlimited`?