Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio

[Remington Furman]

Hi,

I had this same aU problem a few months ago on Linux Mint, but was able to resolve it by editing the default ALSA settings in ~/.gnuradio/config.conf .

I will send detailed notes on the exact fix I made when I get home, but I just found this page also describing the fix:

http://www.funwithelectronics.com/?id=167

(Increase 'nperiods' under [audio_alsa])

After the config change ALSA audio worked with my own WBFM flowgraph and all the sample flowgraphs that were previously broken for me.

Apologies for not sending something to the list when I found the problem.  I knew it would have saved folks from some hair pulling.

Hope this helps,

-Remington

W7REM

On Thu, Jan 15, 2015 at 4:47 AM, Ralph A. Schmid, dk5ras <address@hidden> wrote:

No chance, I do not get any stable audio performance, I assume the Kubuntu
sound system is defective somehow. It is not about sampling rates, the pitch
is correct, just choppy. When calling the dial tone script repeatedly,
sometimes it works, sometimes it causes garbled sounds, then again it works,
with one attempt after another without doing anything else.

Update: Right now I was so brave to uninstall some pulse library stuff, and
what should I say, the stuttering is gone, DMR is not decoding 100% fine,
but I assume now it is a matter of fine tuning the receiver chain and
decoder, audio itself looks OK. Thank you very much for putting me into the
right direction! How can find such a load of BS its way into an official and
widely used Linux distribution?!

Ralph.


> -----Original Message-----
> From: discuss-gnuradio-bounces+ralph=address@hidden
> [mailto:discuss-gnuradio-bounces+ralph=address@hidden] On Behalf Of
> Ralph A. Schmid, dk5ras
> Sent: Thursday, January 15, 2015 8:14 AM
> To: 'Marcus D. Leech'; 'Tom Rondeau'
> Cc: 'GNURadio Discussion List'
> Subject: Re: [Discuss-gnuradio] First time user - fm radio tutorial has
choppy
> audio
>

> Hi Marcus,
>
> > If you use "plughw:0,0" as the hardware designator, it's often willing
> > to do resampling to the actual hardware rate.
>
> Yep, I will try this later. Made my tests this morning on my way to work
by
> train, now it has to wait until lunch break :)
>
> Ralph.
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio


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