[App_rpt-users] USB fob choppy/stuttering audio

[Rob Noll]

Good morning all,

 

I'm trying to set up an AllStar node using a USB fob based on the CM119
chip.  I'm having issues with choppy/stuttering audio, particularly on
telemetry.  It's bad enough that it renders the CW ID meaningless.

My original thought was lack of CPU power, but I have tried it on a
Raspberry Pi 2, Pi 3, and several virtual machines on a quad-core PC with
identical results.  Also, the choppiness is NOT as bad when using the full
USB driver instead of SimpleUSB, which I believe conclusively rules out CPU
power.

I've also tried a powered USB hub, thinking that the USB device was not
receiving enough power, with no improvement.

I've used the Android mobile app to connect to the node, and the telemetry
does not seem to be choppy when listening to it over the app.  While I need
to do some more testing to say this conclusively, I do believe at this point
that my issue is narrowed down to the USB fob itself and/or the specific
audio stream being sent to the device.

I'm currently searching for a way to alter the sample rate that ASL is
sending the audio to the device in.

Has anyone experienced this, and does anyone have any suggestions?

 

Thanks and 73,

 

Rob, WX1N

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.keekles.org/pipermail/app_rpt-users/attachments/20190331/eb7f2050/attachment.html>