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]
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
_______________________________________________
Discuss-gnuradio mailing list
[email protected]
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
