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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Can't change optical-out volume on Terratec Aureon DualUSB"
href="https://bugs.freedesktop.org/show_bug.cgi?id=81777#c17">Comment # 17</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Can't change optical-out volume on Terratec Aureon DualUSB"
href="https://bugs.freedesktop.org/show_bug.cgi?id=81777">bug 81777</a>
from <span class="vcard"><a class="email" href="mailto:main.haarp@gmail.com" title="main.haarp@gmail.com">main.haarp@gmail.com</a>
</span></b>
<pre>(In reply to Tanu Kaskinen from <a href="show_bug.cgi?id=81777#c15">comment #15</a>)
<span class="quote">> (In reply to Tanu Kaskinen from <a href="show_bug.cgi?id=81777#c11">comment #11</a>)
> > (In reply to main.haarp from <a href="show_bug.cgi?id=81777#c9">comment #9</a>)
> > > (In reply to Tanu Kaskinen from <a href="show_bug.cgi?id=81777#c3">comment #3</a>)
> > > > That shouldn't happen... ignore_dB=1 should have the opposite effect:
> > > > software volume should get disabled for the device.
> > > I swear that it reverts to exclusive software-mixing. Maybe it's because PA
> > > on this machine is quite old? (Debian stable has PA 2.0)
> >
> > It sounds unlikely that the behaviour would have changed that way. I'll have
> > to test this myself when I get time.
>
> I now tested ignore_dB with the Aureon card, and it behaved as I expected
> (hardware volume is still used). What exactly do you mean by
> "software-mixing"? My assumption is that you mean software volume, not
> mixing multiple streams (mixing multiple streams is always done in software,
> since PulseAudio doesn't support hardware mixing). How do you determine
> whether "software-mixing" or software volume is being used?</span >
Whoops, I meant software volume, of course. I determined it by changing the
volume after enabling ignore_dB. Seeing as I could change the volume of the
optical-out properly, it was clear that software volume was used.
(In reply to Raymond from <a href="show_bug.cgi?id=81777#c16">comment #16</a>)
<span class="quote">> did your usb support ac3 passthrough using optical output since there is no
> iec958 controls and only one plaback device ?</span >
I'm not sure. Never had the opportunity to test that.</pre>
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