[App_rpt-users] Audio Clipping with IAXRPT / Web Transceiver Client

[Ken]

Yes I guess you could clobber the input side ... a symptom of that is when
you run  "radio tune rxnoise" you would not be able to get a reasonable
setting for the receive gain (rxmixerset= in the radio_tune_usbxxx file).  

Ideally that gain setting should be somewhere in the middle of the range
(say 200-800).

Regards

Ken

(You did run the calibration again after turning off rxboost, right?)

> -----Original Message-----
> From: app_rpt-users-bounces at ohnosec.org [mailto:app_rpt-users-
> bounces at ohnosec.org] On Behalf Of Keith Goobie
> Sent: Sunday, March 03, 2013 4:00 PM
> To: Bryan D. Boyle; app_rpt mailing list
> Subject: Re: [App_rpt-users] Audio Clipping with IAXRPT / Web Transceiver
> Client
> 
> Hi Bryan
> 
> Thanks for the input on the limitations of some USB hubs.  I have seen
that
> before on another project.  In some cases I went back to plain old serial
> ports, but that is not possible here.
> 
> I will keep my eyes open for error messaging in that regard.
> 
> One suggestion, I did receive was to remove the rxboost and I have done
> that.  I think it has helped and I am monitoring it.  This would suggest
that the
> problem was amplitude related and not jitter where I was trying to point
> myself.
> 
> There will be more to follow.
> 
> Again thanks to all for their feedback.
> 
> Keith
> 
> 
> On 3/3/13 3:52 PM, "Bryan D. Boyle" <bdboyle at bdboyle.com> wrote:
> 
> > On 3/3/2013 12:18 PM, Keith Goobie wrote:
> >> Hi Jon
> >>
> >> Just checked the configs -
> >>
> >> All three appearances (we control three URI fobs) of txlinonly are
> >> commented out, do you know what the default is.
> >>
> >> Incoming audio from iaxrpt users seems OK, with no issues.
> >>
> >> Keith
> >
> > One other thing to check...which I'm surprised no one has mentioned,
> > is that frequently the motherboard USB ports are crap.  Plain and
simple.
> > I had the same problem, which I traced down to a 'value engineered'
> > (read as cheap as possible implementation) set of USB ports on my HP
> > computer (who knows whose motherboard) which gave me choppy audio,
> cut
> > outs, etc., which simulated overdriving/limiting apparently on the
> > systems connected.
> >
> > Spent (OMG, there's that word in a ham discussion) 40 bucks for an
> > add-on USB adapter board.  4 ports.  USB 2.0 capable.  Problem went
away.
> >
> > Just some other things to check.
> >
> > Bryan WB0YLE
> > Allstar 27295 27295 27710 etc.
> >
> >
> > _______________________________________________
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> 
> --
> keith at goobie.org
> Keith Goobie
> Richmond Hill, ON, CANADA
> 
> 
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