I haven't been able to find any good documentation on configuring a real time kernel for pro audio in Ubuntu.

I wanna use pure data for live looping performances while using some soft synths and what not and so far, Jack says my latency is 40ms. That's not good enough and I know it can improve.

Thanks

I'm interested, too.

Using Jack, Hydrogen, and Ardour I got my latency down to 11.6ms (frames 512, sample rate 88,200, M-Audio card). You can run Jack in real time but you may need to gksu to get it. That's what I do for Hydrogen, but I rather not run as root for these apps.

Here is some info on a zero latency kernel https://wiki.ubuntu.com/RealTime

I saw some other info but can't locate it right now. I recall it involved recompiling the kernel with the Linux Security Module (LSM). This allows real time access without being root. It looked more complicated than my experience is ready for.