[App_rpt-users] Noise reduction on receive audio from Allstar

Jeffrey S. Carrier jeff.carrier at rmsmsecurity.com
Tue May 8 20:37:14 EDT 2012

If I'm not mistaken, I think he's speaking about RF users with weak
signals into the node itself.  I hear it all the time, since its
digitally processed it sounds less like static and sort of funky though
most times I think it's more pleasant to listen to than pure static. 


Jeff K0JSC




From: Ken [mailto:ke2n at cs.com] 
Sent: Tuesday, May 08, 2012 6:21 PM
To: 'Eric Guth'
Cc: app_rpt-users at ohnosec.org
Subject: Re: [App_rpt-users] Noise reduction on receive audio from


Is it possible you are getting discriminator audio from your radio, but
telling asterisk that it is "flat" audio?


That would make everything high pitched and noisy





From: app_rpt-users-bounces at ohnosec.org
[mailto:app_rpt-users-bounces at ohnosec.org] On Behalf Of Eric Guth
Sent: Tuesday, May 08, 2012 5:34 PM
To: app_rpt-users at ohnosec.org
Subject: [App_rpt-users] Noise reduction on receive audio from Allstar




I notice that when hams are noisy into their Allstar node or the
repeater connected to the Allstar node, the noise on their signal seems
to be higher pitch and accentuated.  Some folks are always noisy and
therefore difficult to copy.  Does anyone else have this problem, and
has anyone reduced the noise with either software running on the server
or some hardware inserted in between the audio from the URI or CM108
dongle to the transmitter?  I was thinking a DSP audio filter (more
expensive than my whole node).  



Eric  4Z5UG


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