[Hpr] What codec to use, Was: Re: Need Tech Supporters for HPR Live Show

Klaatu klaatu at straightedgelinux.com
Fri Dec 30 09:50:54 PST 2011

I am painfully familiar with why this is an issue.  I signed in for an HPR 
book club show a week ago, and could not get Mumble to work on the laptop I 
was using, which was the first time I'd have any problem with Mumble.

Long story short: I had installed Celt 0.7.1-ish and the other two chat 
participants had CELT 0.11.x.  I thought, surely it 's not the version of the 
codec? how could anyone expect to control the version of the codec that 8 or 9 
or even just 3 people are using in a chat?  

Turns out...that was it.  I removed Celt 0.7.x and installed 0.11.x and 
suddenly we were in business.  Apparently there was some major protocol change 
between Celt 0.7.x and 0.11.x that literally makes the two useless in talking 
to one another.

Seems insane to me, but what do I know? I'm just a user.

But anyway, that's why the CELT thing is sort of an issue.  So yes, Speex 
should work, regardless of point-whatever release versions.


> On Fri, Dec 30, 2011 at 11:53:26AM -0500, Bryan Pearson wrote:
> > Im not sure I can pledge a considerable amount of time. But Ill try to be
> > present as much as possible.  Just depends on what my guests want.
> > 
> > I am not sure if has been communicated, what codecs and what versions are
> > we hoping to use?
> > 
> > Bryan
> [snip]
> Not sure what you mean by versions (versions of what?  Mumble?), but
> according to the hpr main page 'Please set compression to the 31.8Kb/s
> speex codec for compatibility (NOT the CELT codec), and use push to
> talk.'  Bruce has a screenshot of the mumble 1.2.3 Configure -->
> Settings --> Audio Input options, where you set the compression quality.
> The screenshot is on the linuxbasix.com home page.
> IIUC, you don't need to get the compression set at exactly 31.8, as long
> as the mumble audio input options display that you'll be using speex.
> IOW, setting the Kb/s to say, 30, is ok.
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> Hpr at hackerpublicradio.org
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- klaatu

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