Er, well, yes. I'd expect to be able to play back music no matter what
else is going on, as long as the system isn't in single-user mode or
something emergency-maintenancy like that. I'm not going to stop listening
to something just because I've got something that happens to be
heavyweight going on at the same time --- unless, that is, it starts to
skip or the machine starts thrashing or something like that.
(Just now I was doing a foreground compilation, a git gc --aggressive of a
500Mb repository, a fairly large 'git grep's, while a background tinderbox
chewed away on the same machine... oh, and the music was coming over NFS,
just to add insult to injury.
There were no skips, but this *is* a quad-core Nehalem with 24Gb RAM so I
suppose skipping would be rather unlikely.)