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@ohnosec.org [mailto:app_rpt-users- bounces@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@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@goobie.org Keith Goobie Richmond Hill, ON, CANADA
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