[Jack-Devel] Remaining problems

[Chris Caudle]

On Tue, March 26, 2019 11:52 am, liebrecht at grossmann-venter.com wrote:
> The problem now is... how to verify that jack actually routes the inputs
> of the 1818vsl properly.

What method will you use to connect jack ports to applications?  I find
qjackctl most convenient, but since you have decided that application is
not for you, will you use mixbus, jack_connect, or something else?

Have you checked here for something useful?
http://jackaudio.org/applications/

jackrec is useful and relatively easy to use:
jackrec -f filename -d seconds [ -b bitdepth ] port1 [ port2 ... ]

Ebumeter can provide visual indication of source level:
http://kokkinizita.linuxaudio.org/linuxaudio/ebumeter-doc/quickguide.html

Jack and ALSA audio analyzer (JAAA) can provide simple test instrument
style use:
http://kokkinizita.linuxaudio.org/linuxaudio/jaaa-pict.html

Keep in mind that if you want to use the S/PDIF input of your interface
you will have to change the clock source to S/PDIF input.  Your output of
lsusb previously posted showed that the interface was using internal
clock, not S/PDIF clock.  If you enable S/PDIF as the clock source you
will need to keep a digital input always running to the interface to
provide the clock.

-- 
Chris Caudle