[david-given]

I've played with JACK a bit, and I've always found it pretty obtuse, but that was a while ago.

The obvious question, though, is: is there a emulation layer for JACK that supports the PulseAudio API?

[the_mitsuhiko]

There is some limited interoperability by nesting PA within JACK: http://www.jackaudio.org/faq/pulseaudio_and_jack.html