[linux-audio-user] Re: [linux-audio-dev] Edirol FA-101

Mark Knecht markknecht at gmail.com
Fri Oct 21 17:48:01 EDT 2005

On 10/21/05, Lee Revell <rlrevell at joe-job.com> wrote:
> On Fri, 2005-10-21 at 23:27 +0400, Dmitry S. Baikov wrote:
> > > Are you using a customized jackd?  What version?  What command line?  Do
> > > you have any evidence that anyone has ever made this work?
> > >
> > Opps, sorry for skipping obviously needed details. Was really upset.
> > I tried freebob + jackd from freebob.sf.net.
> > libavc from svn, libiec61883 1.0, libraw1394 1.2
> > cmdline: jackd -d iec61883 -o osc.udp://localhost:31000
> >
> > FreeBoB wiki's list of working setups contains FA-101 + gentoo (my distro).
> > When run in the first time, jackd starts, but there's no sound, and
> > seems processing callbacks aren't called (no interrupts?).
> I think this would be a better question for the Freebob list, and cc:
> the jackit-devel list, as you're using a version of JACK that the
> Freebob people have customized.  I've never heard anyone on LAD or LAU
> report that this works.
> First and foremost, we need to get the iec61883 driver into JACK CVS, so
> that Paul Davis and the other JACK experts can help you.
> Lee

In case some folks don't know this stuff iec61883 is part of the 1394
stack. Why would it go into Jack CVS?

My rudimentary understanding (from a good awful number of years
working on 1394 OHCI Link and Phy chips - not software) is that
iec61883 is an encapsulation process that places timing info and data
packets into a larger chunk of data most commonly moved across, but
not limited to, the 1394 bus. 61883 is a really basic way to get MPEG
data broken apart and put back together so that you can move movies
across 1394.

NOTE: There are multiple parts, 6 or 7 now, to iec61883. I'm not sure
which ones Linux-1394 is supporting.

>From a cursory reading of the Freebob list I have not heard of any
special versions of Jack required to run it, but I frankly haven't
paid a huge amount of attention to it. Does anyone know?

I do agree that this question belongs there. They seem to respond
pretty quickly to questions like this.

- Mark

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