[App_rpt-users] USB fob choppy/stuttering audio

[Mike]

Try other FOB with a cm108


...mike/kb8jnm

On 3/31/2019 11:58 AM, Bob Pyke wrote:
> I don’t know if this fits your situation, but the only time I’ve had 
> choppy audio is when something in asterisk or Linux is unhappy; most 
> likely asterisk. I’d check your USB related settings (usbradio or 
> simpleusb).
>
> Thanks,
> Bob
> K6ECM
> 73
>
>
> On Mar 31, 2019, at 7:26 AM, Rob Noll <rob at nollmail.com 
> <mailto:rob at nollmail.com>> wrote:
>
>> 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
>>
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