> $ jackd
-d alsa -d hw:0 --> fire up
jackd on first card
> $ alsa_in -d hw:1 --> add second card
> $ alsa_in -d hw:2 --> add third card
a.s.o.
>
> Then, use any jack capture client you want,
including jackrec,
jack_capture and ardour, just to name a few.
This deals with the clock sync issue as is?
yep.
At the expense of the CPU. alsa_in/out can be configured with different resampling quality
(0 to 4 IIRC, 4 being the best but most CPU intensive).
J.