[LAU] Jack & pulse...knickers in a twist.

[Bill Purvis]

On 06/06/18 14:12, Mac wrote:
>
>
> ....
>
> Apparently not. I tried "jack_control dps device surround71:PCH,0" and 
> still got playback_1,_2. (There are also surround21, 41, etc. none of 
> those changed anything either.)
> As for hdajackretask, when I tried to "Apply now" I got a device busy 
> message. I didn't try "Install boot override".
>
>     In my case the real answer is I don't know. I tend to disable any
>     internal audio device to clear up one more thing that may
>     interfere with "real audio".
>
>
I use qjackctl, so I'm not that familiar with the command line interface.
In the Qjackctl settings panel, under advanced, it shows the 'system' 
output device,
and also a field for number of channels. I had an 8-channel DAC 
connected a while back
and setting channels=8 and restarting produced 8 system outputs. So it 
is possible.

Looking at web pages for jack_control, I'd suggest trying:

     jack_control dps device surround71LPCH,0
     jack_control dps channels 7

might be the answer?
Bill

-- 
+----------------------------------------+
| Bill Purvis                            |
| email: bill at billp.org                  |
+----------------------------------------+

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