Wow, 12.04 (though still supported by GNU Radio!) feels ancient. Any particular reason you stick with that?
On 28.08.2015 15:09, Murray Thomson wrote: > Thank you for your suggestions. > The card supports 96 KHz and I'm using hw. I'll try to use plughw. > I've solved this problem upgrading to the latest kernel in 12.04 which > is 3.13.0-62. > > Regards, > Murray > > On 28 August 2015 at 13:52, Marcus Müller <[email protected] > <mailto:[email protected]>> wrote: > > Also make sure that the ALC662 also supports the audio sampling rate > you're using -- 44100 is the only rate I've been able to use on any > platform [1]. > > Best regards, > Marcus > > [1] http://gnuradio.org/redmine/projects/gnuradio/wiki/ALSAPulseAudio > > On 28.08.2015 12:31, Jeff Long wrote: > > Make sure you're using 'plughw:' for the audio device so the driver > > does resampling (check ALSA docs). Without looking at the flowgraph, > > I'd guess this is a clock domain problem and your new computer (and > > audio card) clocks are somehow different than your old ones. > > > > On 08/28/2015 04:40 AM, Murray Thomson wrote: > >> Hi, > >> > >> I have a flow graph that receives, demodulates and filters a signal > >> before sending it to the audio card. It's been working in a single > >> board, single core, computer with an audio card ALC888 for > months. I > >> occasionally had underrun messages, specially when changing filter > >> parameters. This messages were normally less than 10 and very > spread, > >> about every 30 seconds. It didn't cause any noticeable noise or > >> problems. > >> > >> Recently I moved to a better computer with better CPU, 4 cores > and a > >> ALC662 audio card. The Python script works fine, with no visible > >> bottlenecks in the processor. However, I now get constant > overruns and > >> underruns reported, making the audio noisy. > >> The audio card is able to work correctly when using the > speaker-test > >> command so, there isn't a fault in the hardware. It's also > capable of > >> running at the required sample rate. > >> > >> Is there any test I could make to understand and fix this > issue? Has > >> anyone had a bad experience using this audio card with GnuRadio? > >> > >> Thanks, > >> Murray > >> > >> > >> > >> > >> _______________________________________________ > >> Discuss-gnuradio mailing list > >> [email protected] <mailto:[email protected]> > >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >> > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > [email protected] <mailto:[email protected]> > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] <mailto:[email protected]> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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