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

Eric Guth eric at efratnetworks.com
Wed May 9 00:13:07 EDT 2012

I am referring to audio coming from the link and transmitted to me on my node.


Eric. 4Z5UG

On May 9, 2012, at 3:21 AM, "Ken" <ke2n at cs.com<mailto:ke2n at cs.com>> wrote:

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> [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<mailto: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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