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<div class="moz-cite-prefix">On 06/06/18 14:12, Mac wrote:<br>
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<div>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.)</div>
<div>As for hdajackretask, when I tried to "Apply now" I got
a device busy message. I didn't try "Install boot
override".<br>
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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".<br>
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I use qjackctl, so I'm not that familiar with the command line
interface.<br>
In the Qjackctl settings panel, under advanced, it shows the
'system' output device,<br>
and also a field for number of channels. I had an 8-channel DAC
connected a while back<br>
and setting channels=8 and restarting produced 8 system outputs. So
it is possible.<br>
<br>
Looking at web pages for jack_control, I'd suggest trying:<br>
<br>
jack_control dps device surround71LPCH,0<br>
jack_control dps channels 7<br>
<br>
might be the answer?<br>
Bill<br>
<pre class="moz-signature" cols="72">--
+----------------------------------------+
| Bill Purvis |
| email: <a class="moz-txt-link-abbreviated" href="mailto:bill@billp.org">bill@billp.org</a> |
+----------------------------------------+
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