Hello:
Thanks to everyone who has replied. It seems that audio processing has
some sort of timing issues.
When I experiment with the channelizers detailed in;
http://www.trondeau.com/examples/2014/1/23/pfb-channelizers-and-synthesizers.html
https://static.squarespace.com/static/543ae9afe4b0c3b
Maybe watch your CPU utilization with htop when you're recording with
terminal command to /dev/null, and compare it to gnuradio with a null
source.
If you take out or disable the audio source, the underflows should go away.
On Tue, Mar 17, 2015 at 5:14 PM, Marcus Müller
wrote:
> Hi Larry,
>
>
Hi Larry,
if I understand correctly, then you're using the audio source as "input"
to your usrp_sink-terminated flow graph.
In that case, the "U"nderruns come from UHD, not the audio source; the
flow graph is not supplying samples fast enough.
The problem might be systematic, for example if the r
