[App_rpt-users] usbradio pre- & de-emphasis

Bob Pyke k6ecm1 at gmail.com
Wed Jul 12 22:59:18 EDT 2017


Good feedback, thanks much

Sent from my iPhone

> On Jul 12, 2017, at 8:30 PM, Tim Sawyer <tisawyer at gmail.com> wrote:
> 
> In my estimation it's best to let the radio do the filtering whenever possible. It's not that app_rpt does anything bad, it does a perfectly find job. I just think the filtering and limiting in the radio will work and sound as intended by the manufacture. Of course there are always exceptions and extenuating circumstances... ymmv.   
> 
>> On Tue, Jul 11, 2017 at 12:05 PM, Kevin Custer <kuggie at kuggie.com> wrote:
>> Sounds like you're de-emphasizing the RX audio and not pre-emphasizing the TA audio, but should be.
>> 
>> The exact set-up is determined by the radio and what it wants/needs.  What radio are you using and how do you have it connected?  What radio adapter are you using?
>> 
>> Kevin
>> 
>> 
>> 
>> 
>>> On 7/11/2017 1:42 PM, Bob Pyke wrote:
>>> When I first setup a RPi with DIAL on our repeater, it sounded tinny, and I made a change in configuration in usbradio that de-emphasized the audio. It was too much, loosing too many of the higher frequency components that make for clarity of audio. I'm looking for information on what settings (e.g. dsp, and the rx and tx settings, =flat, =speaker, etc) that have a pre- or de-emphasis effects in app_rpt. A general discussion would be useful as well. I can address this in hardware, but wanted to explore the software approach first.
>>> 
>>> Thanks,
>>> Bob
>> 
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> 
> 
> 
> -- 
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> Tim
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