Re: Does alsa_in reading from SPDIF input inject pops and clicks?

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* Does clock source matter if alsa_in resamples every audio sample to jack
server's clock? Is it impossible to extract audio sample without knowing
clock?
* How can I have my computer automatically switch clock source between
SPDIF and internal? Is there a clock source named "SPDIF or internal"?

On Fri, Aug 9, 2019 at 7:21 AM Chris Caudle <[email protected]> wrote:

> On Thu, August 8, 2019 5:10 pm, crocket wrote:
> > Does changing clock source to internal clock or SPDIF make any difference
> > on pops and clicks?
>
> Your clock setting has to be consistent with the audio data flow.  If you
> are sourcing audio data from S/PDIF input and set the clock source to
> internal you will definitely get pops and clicks.  Internal clock should
> only be used when audio input is through the converters on the interface,
> or if you are only using S/PDIF for output.  The clock source should only
> be set to S/PDIF if you have a valid S/PDIF data stream present, and you
> should also verify that the sample rate you set for the interface matches
> the actual rate of the S/PDIF data.
>
> --
> Chris Caudle
>
>
>
>
> _______________________________________________
> Jack-Devel mailing list
> [email protected]
> http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org
>

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<div dir=3D"ltr">* Does clock source matter if alsa_in resamples every audi=
o sample to jack server&#39;s clock? Is it impossible to extract audio samp=
le without knowing clock?<div>* How can I have my computer automatically sw=
itch clock source between SPDIF and internal? Is there a clock source named=
 &quot;SPDIF or internal&quot;?</div></div><br><div class=3D"gmail_quote"><=
div dir=3D"ltr" class=3D"gmail_attr">On Fri, Aug 9, 2019 at 7:21 AM Chris C=
audle &lt;<a href=3D"mailto:[email protected]">[email protected]</a=
>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px=
 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On =
Thu, August 8, 2019 5:10 pm, crocket wrote:<br>
&gt; Does changing clock source to internal clock or SPDIF make any differe=
nce<br>
&gt; on pops and clicks?<br>
<br>
Your clock setting has to be consistent with the audio data flow.=C2=A0 If =
you<br>
are sourcing audio data from S/PDIF input and set the clock source to<br>
internal you will definitely get pops and clicks.=C2=A0 Internal clock shou=
ld<br>
only be used when audio input is through the converters on the interface,<b=
r>
or if you are only using S/PDIF for output.=C2=A0 The clock source should o=
nly<br>
be set to S/PDIF if you have a valid S/PDIF data stream present, and you<br=
>
should also verify that the sample rate you set for the interface matches<b=
r>
the actual rate of the S/PDIF data.<br>
<br>
-- <br>
Chris Caudle<br>
<br>
<br>
<br>
<br>
_______________________________________________<br>
Jack-Devel mailing list<br>
<a href=3D"mailto:[email protected]" target=3D"_blank">Jack-De=
[email protected]</a><br>
<a href=3D"http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org=
" rel=3D"noreferrer" target=3D"_blank">http://lists.jackaudio.org/listinfo.=
cgi/jack-devel-jackaudio.org</a><br>
</blockquote></div>

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