[LAD] JACK on Gigaport HD+ at 4800kHz (reduced channel count)

Paul Davis paul at linuxaudiosystems.com
Tue Feb 25 16:00:30 UTC 2014

On Tue, Feb 25, 2014 at 10:52 AM, Fons Adriaensen <fons at linuxaudio.org>wrote:

> On Tue, Feb 25, 2014 at 10:09:16AM -0500, Paul Davis wrote:
> > the option doesn't alter what the JACK backend sees from ALSA (or
> > wherever). it changes which channels get represented by JACK ports.
> Wrong. If things were as you claim, this should just work:
> (on a 64-ch card)
> fons at hypatia:~> jackd -P70 -p256 -t2000 -u -dalsa -dhw:0,0 -r48000 -p256
> -n2 -i16 -o16
> ...
> ALSA: cannot set channel count to 16 for capture
> ALSA: cannot configure capture channel
> cannot load driver module alsa
> The -i and -o values ARE used as parameters to ALSA, and
> not just to determine how many of the available channels
> are mapped to Jack ports. You can also verify this in the
> sources.

clearly i have losted a RAM card or something. I could have sworn it worked
as i described because otherwise i could never have tested it on an RME
card without avoiding hw:N

i should run the memory checker on myself these days.
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