Check Bitwig or Reaper (recommended by some people in a different comment) if you want something more stable. And yeah, KXStudio has great tools for configurin

Check Bitwig or Reaper (recommended by some people in a different comment) if you want something more stable. And yeah, KXStudio has great tools for configuring and managing Jack with Pulseaudio. You can install it on top of Ubuntu via it's deb repository. Lately I've been using Arch. Arch's audio packages are also very well configured. There's even a Bitwig package in the AUR. That's how I installed Bitwig :) It's the best of both worlds.