Re: [Discuss-gnuradio] Audio issues on BBB

[Philip Balister]

On 05/29/2017 07:49 AM, Usman Haider wrote:
> Hi,
> 
> I am using GNU Radio on beaglebone black (BBB). I have transmitter and
> receiver flowgraph with audio sink audio source. When I run the flowgraphs
> on laptop or desktops I receive all the data packets correctly. But when I
> run either receiver or transmitter flowgraph on BBB there are intermittent
> packet drops. Packet loss is very small but it is there. There are no audio
> underruns or audio overruns. I am using a usb sound card with BBB.
> 
> I am using jessie 8.6 on BBB, GNU Radio version is 3.7.10.1. Enabled
> components are shown below
> 
> $ gnuradio-config-info --enabled-components
> python-support;testing-support;volk;gnuradio-runtime;gr-blocks;gnuradio-companion;gr-fft;gr-filter;gr-analog;gr-digital;gr-audio;*
> alsa;* oss;* jack;*
> portaudio;gr-channels;gr-noaa;gr-pager;gr-utils;gr-video-sdl;gr-vocoder;gr-fcd;gr-wavelet;gr-wxgui;gr-zeromq
> 
> 
> Have anyone else tried using usb audio sound card on BBB with gnuradio
> before? Any idea what could be wrong? Thanks

Try using perf top to get an idea where the flowgraph hot spots are. The
BBB is a single core arm, so there isn't much processing power.

Philip


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