Re: Default device frequency changes between calls.

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On Wed, Jan 9, 2013 at 12:25 PM, Chris Robinson <[email protected]>wrote:
>
>
> That would likely be PulseAudio's fault. Starting with version 2, it added
> the ability to change the playback frequency depending on what the app
> wants. By default OpenAL Soft specifies PA_STREAM_FIX_RATE, which basically
> tells Pulse "I don't care, just give me whatever's in use". When it does
> that while nothing's playing, it'll give back either 44.1khz or 48khz for
> most people.
>
> I find that behavior rather annoying personally, since it won't try to
> change the playback rate while playing. So if you have one app that
> requests a 44100hz stream and another that requests a 48000hz stream, the
> actual device output will depend on the order the two sounds are started
> in, and then stay that way until all streams stop. Plus the behavior of
> apps that don't strictly care will change depending on what was last set
> and how long ago it was set (I've noticed OpenAL Soft will get 44100hz for
> a while after Flash has played sound, and eventually get 48000hz some time
> after Flash has stopped).
>


Yes, that is rather annoying! Again, thanks to you for the excellent
feedback and help you provide on the mailing list.

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<div class=3D"gmail_quote">On Wed, Jan 9, 2013 at 12:25 PM, Chris Robinson =
<span dir=3D"ltr">&lt;<a href=3D"mailto:[email protected]" target=3D"_bl=
ank">[email protected]</a>&gt;</span> wrote:<blockquote class=3D"gmail_q=
uote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1e=
x">
<div class=3D"im">
<br></div>
That would likely be PulseAudio&#39;s fault. Starting with version 2, it ad=
ded the ability to change the playback frequency depending on what the app =
wants. By default OpenAL Soft specifies PA_STREAM_FIX_RATE, which basically=
 tells Pulse &quot;I don&#39;t care, just give me whatever&#39;s in use&quo=
t;. When it does that while nothing&#39;s playing, it&#39;ll give back eith=
er 44.1khz or 48khz for most people.<br>

<br>
I find that behavior rather annoying personally, since it won&#39;t try to =
change the playback rate while playing. So if you have one app that request=
s a 44100hz stream and another that requests a 48000hz stream, the actual d=
evice output will depend on the order the two sounds are started in, and th=
en stay that way until all streams stop. Plus the behavior of apps that don=
&#39;t strictly care will change depending on what was last set and how lon=
g ago it was set (I&#39;ve noticed OpenAL Soft will get 44100hz for a while=
 after Flash has played sound, and eventually get 48000hz some time after F=
lash has stopped).<br>
</blockquote><div><br></div><div>=A0</div><div>Yes, that is rather annoying=
!=A0Again, thanks to you for the excellent feedback and help you provide on=
 the mailing list.</div></div>

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