On Saturday 29 December 2012 06:43:49 Ben Bell wrote:
Hi all,
Having recently acquired a second Delta 1010 for my setup I've been trying
to run the two in tandem using the alsa Multi hack. I'm getting the xruns
that I understand are expected but harmless[1] but I'm also getting some
audible ones, which are obviously more of a problem. They're synched via
the S/PDIF link and running either card on its own seems pretty solid.
I've seen on various mailing lists people talking about digging into this
but not found any conclusions. Is anyone here running dual Delta 1010s
who can double check I'm running the latest recommended settings?
I'm on a dual core 2.3GHz Athlon (4450e), running linux 3.2.0-2-rt with
cpu scaling disabled, and the cards have exclusive use of IRQs 17 and 18.
Jack is running at 44.1KHz with 6 frames and 64 periods, audio IRQs at
rtprio 85 and Jack at rtprio 82.
Suggesting from ignorance here.
Have you tried using one via jack and the other one via an alsa<->jack bridge
and then sync the two via the wordclock?
I actually have two but the first died before the second got here so I have
never been able to try out more than one at once.
bjb
all the best,
drew