[App_rpt-users] Simplex node

[Kevin Custer]

On 3/27/2015 9:55 AM, Doug Crompton wrote:

> ------------snip-------------
> Although there has been a slight improvement in usbradio in the latest 
> svn it still does not have the exceptionally clean audio that 
> simpleusb does.
>
> *73 Doug
> WA3DSP
> http://www.crompton.com/hamradio*

Doug,

I have seen this statement from you many times.  I have about 50 
installations of usbradio where I don't experience these issues you 
claim.  Will you please quantify your statement as to whether or not the 
issues you claim are for the BBB release, or any ACID release - and also 
if it pertains to only the BBB or any computer platform.

I have baseline performance specifications using usbradio and PC 
hardware.  While the performance does change slightly due to the exact 
radio adapter device, the overall response and distortion specifications 
are very consistent when using G.722 -u-law.  My performance 
specifications show that any distortions or response issues contributed 
directly by app_rpt, any channel driver, or the radio interface are well 
below detection by the human ear.  In fact, I can guarantee you that 
more distortion is generally experienced when running simpleusb audio 
through any radio.  In other words, there is more distortion and 
response issues because of the radio then from this application and its 
supporting hardware in usbradio.

I'll apologize that I had to hijack this thread from the arm-allstar 
email group and re-post it here - because I'm no longer allowed to 
participate in your group directly.

As Allan Crites would say - "Your turn"...

Kevin Custer - W3KKC


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