Also worth mentioning that there are enormous USB audio improvements in kernel version 5.10.0, both for performance, stability, and compatibility. As far as I k

Also worth mentioning that there are enormous USB audio improvements in kernel version 5.10.0, both for performance, stability, and compatibility. As far as I know, there are no real-time kernels available for Pi 4 with a kernel version greater than 5.10.0, and building one is painfully difficult.