netjack over localhost does not make sense. you can
just use jackd on
your primary soundcard and alsa_[in|out] on your secondary. but the
realtime resampling will either chew up insane amounts of cpu, or
degrade the sound, or both. ok for telephony or for listening to
unimportant stuff over small speakers, but not for serious work.
The point is, with
netjack over localhost there is no realtime
resampling. I have a very high quality PCI sound card with RCA outs,
and when I gig with this rig I don't want to be lugging around the USB
device I'm going to need for additional inputs.
J.E.B.