I would like to use a real time kernel for better audio latency, I use Stereo Tool as a general DSP (Yes, very overkill) and the total latency of 150ms is a little annyoing at times.
So I have installed the linux 5.9 rt kernel and checked if I have the rt preempt flag which i do.
But when I check the niceness of pulseaudio it is still at -15, despite being configured in /etc/pulse/daemon.conf to use real time scheduling.
Same with executing the Stereo Tool application, which supports real time, running it with sudo or with sudo nice -n 99, the niceness will still be 0 in htop.
Now the weird thing. I can set the priority of the process in ksysguard to fifo highest priority, and it will show in htop as being “RT”, but… the audio still stutters at diversity delay below 40 ms, which means it is definitely not running real time according to their guide.
Do I need to create a new user group or something to run programs within that?