[PlanetCCRMA] jackd and two Delta1010 cards

[Bob Wilkinson]

That is something that I need to fix - not because it's an error, but because I'm not using all the channels.

The "1010" has 8 analog inputs, 2 digital inputs, or 10 audio inputs total.  However, it has MIDI input as well.

I am only setting this up for analog, though (the digital and MIDI are commented out).  Thanks for noticing that!


 -------------- Original message ----------------------
From: "Mark Knecht" <markknecht at gmail.com>
> On 7/3/06, Bob Wilkinson <wilkinson.bob at comcast.net> wrote:
> > I am less concerned about the wordclock sync issue, because the Delta1010 is a 
> true multichannel card with wordclock in/out, so the wordclock of the first card 
> can control the second.  (I took option "A" - buy the expensive card.  The only 
> problem is, I bought two).  I just want more than 8 channels - ideally I will 
> have 24 analog input, but right now I'm working with 16 analog.
> >
> > I just wanted to avoid Windows as much as possible, and fell in love with 
> Ardour when I only had one 1010 to work with.
> >
> > Thanks for the start - if anyone else has any suggestions, I will be very 
> appreciative!
> >
> >
> <SNIP>
> > > > I have searched the web, and found an .asoundrc file (I actually wrote it 
> to
> > > /etc/asound.conf) to create the "virtual" card (binding the two cards 
> together).
> > > My asound.conf file looks like this:
> > > >
> > > > pcm.multi_capture {
> > > >         type multi
> > > >         slaves.a.pcm hw:0
> > > >         slaves.a.channels 12
> > > >         slaves.b.pcm hw:1
> > > >         slaves.b.channels 12
> > > >
> <SNIP>
> > > >
> > > > ctl.multi_capture {
> > > >         type hw
> > > >         card 0
> > > > }
> > > >
> > > > pcm.multi_playback {
> > > >         type multi
> > > >         slaves.a.pcm hw:0
> > > >         slaves.a.channels 10
> > > >         slaves.b.pcm hw:1
> > > >         slaves.b.channels 10
> > > >
> <SNIP>
> 
> > > > }
> > > >
> > > > ctl.multi_playback {
> > > >         type hw
> > > >         card 0
> > > > }
> > > >
> > > > However, when I attempt to run JACK from a command line,
> > > >
> > > > jackd -d alsa -C multi_capture -P multi_playback
> > > >
> > > >  I get the error:
> > > >
> > > > ALSA: mmap-based access is not possible for the capture stream of this 
> audio
> > > interface
> > > > ALSA: cannot configure capture channel
> > > >
> 
> Bob,
>    I have no experience with this so I'm just poking around. However,
> if the card is a '10-10' then why is the asound.rc file seem to be
> defining a '12-10'?
> 
>    The capture section says there are 12 capture channels but the card
> only has 10 and the error message says it cannot do something on the
> capture side. That looks suspect to me.
> 
> Good luck,
> Mark