[Fedora-music-list] Re: Trouble getting Jack to work with "extra Device"

[Keith Smith]

On Wed, 2020-12-23 at 20:01 -0800, Keith Smith wrote:
>  I'm having trouble getting audio output to my internal ACS1220A
>  motherboard audio (connected to external speakers) when Jack is using
>  an external USB audio interface for input.
>  
>  !. with Jack not running, pulseaudio works fine and sound (music
>  file)
>  comes out of the ACS1220A
>  
>  2. with Jack configured to use the USB audio interface as source and
>  sink, and pulseaudio bridge, it works fine. Sounds is heard from the
>  USB audio interface headphone.
>  
>  However, If I add the AC1220A PCH 1,0 digital output device to JACK
>  (via studio controls "Extra Devices")  it shows up in Carla, and I
>  can
>  connect it up so that all output (pulse_out) goes to it, but there's
>  no
>  sound.
>  
>  I check the ALSA mixer and pulse mixer controls and don't see any
>  problems.
>  
>  I tried setting up Studio controls a few different ways, but nothing
>  seem to work.
>  
>  Does anyone have any experience with this type of problem?  seems
>  like
>  it should work.
>  
>  Thanks,
>  Keith
>  
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Found the problem.  It appears that Studio controls is not passing the
correct hardware information to zita-j2a for my internal soundcard.

In studio Controls under Extra Devices - Add (available) the internal
Audio device is listed as: "PCH,1,0 playback (ALC1220 digital)".  When
I add this device I see it in the Carla patchbay and can route audio to
it, but no sound is produced.

From a kconsole if I run:

zita-j2a -j MYTRY -d hw:1,0  

I then see a new sink device "MYTRY" in the Carla patchbay. When I
route audio to it I successfully get sound output.   I also get sound
output over my external USB audio interface which is the desired
behavior.

I would report this to github.com/ovenwerks/studio-controls, but the
version described there seems to be newer than what is provided in
Fedora Jam.  I'm not sure how to figure out what version Fedora uses vs
the released version?

-Keith