[LAU] How to automatically start zita-j2a/a2j with jack?

Paul Davis paul at linuxaudiosystems.com
Tue Oct 15 22:19:47 CEST 2019


On Tue, Oct 15, 2019 at 11:47 AM Brent Busby <brent at keycorner.org> wrote:

> Joakim Hernberg <jhernberg at alchemy.lu> writes:
>
> > On Mon, 14 Oct 2019 11:22:14 -0600
> > Paul Davis <paul at linuxaudiosystems.com> wrote:
> >
> >> > IIRC jack2 can do this too, but it doesn't use the same command line
> >> > parms, rather you'd have to run "jack_load audioadapter". I'm pretty
> >> > sure this can be automated but don't remember the details.
> >>
> >> Not so. zita_ajbridge (zita_a2j and zita_j2a) can both be used by
> >> jack1 and jack2.
> >
> > What I meant is that JACK2 also has functionality to connect to several
> > sound cards, but it's enabled differently than the JACK1 builtin
> > client.  Of course zita_ajbridge can alternatively be used with both
> > versions of JACK.
>
> This is something I'm interested in doing, but I've not looked into
> whether it's possible or what would be necessary -- using Jack 2 with
> multiple interfaces.
>
> I'd like to record drums with a track per mic, but on an 8-piece set
> with a hi-hat mic and two overheads, that's a lot of inputs.  (I have a
> mixer that can provide mic preamps and line level direct outs per
> channel, so preamps aren't the problem, just quantity of analog ins on
> the computer side.)  My Multiface-II only has eight analog inputs, but I
> also have a Babyface Pro which could possibly offer more.  Is there a
> way I could use them both simultaneously with Jack 2?  Could that be
> setup from preferences in QJackCtl somehow, or from some other frontend?
>

My email explains how to do that. Also, AFAIK, zita's resampling code is
much better than the equivalent in jack2's "audioadapter".

Re-read it, and if it is still not clear, let me know.
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