[PlanetCCRMA] Tascam US-122 audio problem

[Fernando Lopez-Lezcano]

On Tue, 2005-02-22 at 11:38, Ben Cohen wrote:
> Thanks for the reply Jason, you've cleared a lot of
> things up. I added the following lines to
> modprobe.conf but I didn't notice any changes (was I
> meant to?):
> 
> alias snd-card-1 snd-usb-usx2y
> options snd-usb-usx2y index=1 nrpacks=4
> options add -k snd-card-1
> 
> I'm using jack 0.99.36 with (qjackctl) is I guess I
> can't use the low latency with nrpacks=1.
> 
> I'm expect the device to show up in jack as additonal
> alsa input/output ports. Is this correct?


Hmmm, not really, jack can only use one card at a time. You have to
change the device that jack uses. Double check which devices and cards
you have:
  cat /proc/asound/cards
  cat /proc/asound/devices
If you have two cards and the second one is the tascam then you should
use "hw:1" for jack instead of "hw:0"

-- Fernando

>  --- jason.ronallo@gmail.com wrote: 
> > Ben,
> > Replying off-list.  Please summarize on list if this
> > is helpful.
> > I have a US-122.
> > The only controls for this are hardware.  That it
> > shows up in qamix is
> > a good thing since you know that it's recognized,
> > but there shouldn't
> > be any controls there.
> > You won't be able to use alsaconf to configure the
> > card as far as I know.
> > 
> > You should configure your modprobe.conf file
> > (probably
> > /etc/modprobe.conf) to contain the following lines
> > (where N is the
> > number of the card, N=1 would be the second card):
> > 
> > 
> >   alias snd-card-N snd-usb-usx2y
> >   options snd-usb-usx2y index=N nrpacks=1
> >   options add -k snd-card-N
> > 
> > 
> > About that nrpacks=1 bit.  You might change that to
> > nrpacks=4
> > depending on what kernel and version of jack you are
> > running.  If
> > you've got a very recent realtime kernel and jack
> > 0.99.44+ (me thinks)
> > then you can use the rawusb hwdep experimental
> > driver to achieve nice
> > low latencies, but only if you have nrpacks=1. 
> > nrpacks=4 will work
> > more stably for older realtime kernels.
> > 
> > Are you using jack?  Then I can probably help more. 
> > I haven't tried
> > to use it without jack, since my internal soundcard
> > on my laptop is
> > enough for regular use, but I'm sure it can be used
> > just under alsa.
> > 
> > Do a search for Rui Nuno Capela or rncbc and Tascam
> > and you should
> > find out a lot more about these Tascam cards under
> > Linux and their
> > history.  He's got another model and has really been
> > the one who
> > pushed for support for them.
> > 
> > Let me know if you need any more help with this one.
> >  I'm grateful for
> > those who've helped me get it up and running.
> > 
> > --Jason
> 
> 
> 	
> 	
> 		
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