im using jack on my kde4 laptop, and it works great. i get simultaneous audio streams and projectM-jack is a dream. after a lot of work, i managed to get most of my applications to work with the new setup, however, i am still having issues with amarok. the only way i can use it is if i open it first when i boot up, and then never pause it. if i pause it or use ANY other application that features sound, amarok will open up, but not output any sound at all. has anyone gotten amarok to work with jack, and if you have, what steps have you taken?

Greetz
I have been running Jack forever since multitrack recording is a must have for me and I also enjoy plugins like LADSPA's "Tube Warmth" for depth without loss of sheen. I'm running a custom kernel for realtime, low latency DAW work. My system is presently Slack 13.37 32 bit with PAE enabled for up to 4GB ram. Although I can run Amarok, it is extremely rare that I do since I prefer Jukez or Aqualung, especially the latter. Perhaps you would do well to try these.

actually, i disliked both jukez and aqualung, amarok has always been my player of choice. my eventual solution was to switch back to mpd + sonata, simply because amarok was too confusing to get working. i wont be marking this thread as solved, as the issue was never truly solved, just ignored and forgotten.

I don't know about KDE4 but in KDE3.5 Amarok used artsd as a backend. I'd expect now that it would be using phonon. So my guess would be that you would have to compile phonon with jack support and kill and restart phonon explicitly using jack as a backend. Keep in mind that this is a guess and I don't know enough about KDE4 to verify my claims (and since I don't use it I'm less likely to try to get this working myself).