[App_rpt-users] Very strange problem with DIAL + USB URIs.

[David McGough]

Hi John,

When you start to have the audio problems, try running the dahdi_test 
program from a bash prompt. Here are sample numbers from a Raspberry Pi 
3B plus, with turbo mode enabled:

[root at kb4fxc-portable asterisk]# dahdi_test -c 100
Opened pseudo dahdi interface, measuring accuracy...
99.992% 99.989% 99.996% 99.995% 99.996% 99.996% 99.993% 99.995% 
99.994% 99.992% 99.995% 99.995% 99.995% 99.996% 99.993% 99.995% 
99.995% 99.995% 99.993% 99.994% 99.994% 99.995% 99.994% 99.994% 
99.994% 99.993% 99.994% 99.994% 99.994% 99.994% 99.994% 99.994% 
99.994% 99.993% 99.994% 99.993% 99.995% 99.995% 99.995% 99.996% 
99.995% 99.995% 99.995% 99.995% 99.995% 99.996% 99.995% 99.994% 
99.995% 99.994% 99.995% 99.995% 99.995% 99.995% 99.995% 99.995% 
99.996% 99.994% 99.995% 99.995% 99.995% 99.995% 99.995% 99.995% 
99.995% 99.994% 99.995% 99.995% 99.995% 99.995% 99.996% 99.995% 
99.995% 99.994% 99.995% 99.995% 99.995% 99.996% 99.995% 99.995% 
99.995% 99.994% 99.995% 99.995% 99.995% 99.995% 99.996% 99.994% 
99.995% 99.994% 99.995% 99.996% 99.994% 99.995% 99.995% 99.995% 
99.995% 99.993% 
--- Results after 98 passes ---
Best: 99.996% -- Worst: 99.989% -- Average: 99.994621%
Cummulative Accuracy (not per pass): 99.995


73, David KB4FXC



On Thu, 19 Apr 2018, John Locke wrote:

> I am testing with 3 o 4 different PC models with the same problem, all new
> models...
> Some of them can run for 2 days without the problem, some get the audio
> chopped in just a few hours.
> 
> I'm using usbradio. Do you think that the simpleusb can work better?
> 
> I have no experience with simpleusb, and I'm willing to pay some consulting
> hours to solve this problem...
> 
> Some advice would be very appreciated
> Thanks in advance
> Best Regards
> John
> 
> 
> 
> On Tue, Apr 17, 2018 at 3:48 PM, Bob Pyke <k6ecm1 at gmail.com> wrote:
> 
> > From my experience, it’s not the URI; more likely an issue with the
> > computer USB controller in the PC. ...Spent a bit of time finding that one.
> >
> > Thanks,
> > Bob
> > K6ECM
> > 73
> >
> >
> > On Apr 17, 2018, at 7:05 AM, John Locke <jldharma at gmail.com> wrote:
> >
> > Hi,
> > I have a very strange problem with DIAL + USB URIs.
> > I get choppy audio after a couple of days or maybe several hours of
> > constant use.
> > Restarting asterisk or even the PC wont solve the problem.
> > The problem only goes away if I connect the URI to another USB or shut
> > down the PC for several hours.
> > Maybe some temperature problem on the USB card??
> >
> > I'm using a standard PC (i5 + 8GB) with 2 USB URIs.
> > To test the problem I connected a tone generator to the URIs.
> > These are some examples of the saved audio files in asterisk:
> >
> > Normal
> > <image.png>
> >
> > After several hours
> > <image.png>
> >
> > <image.png>
> >
> > <image.png>
> >
> > after one day
> > <image.png>
> >
> > <image.png>
> >
> > Some advice would be very appreciated
> > Thanks in advance
> > Best Regards
> > John
> >
> >
> >
> >
> >
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