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

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

Ken

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

Folks,

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). 

73,

Eric  4Z5UG