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

Jeffrey S. Carrier jeff.carrier at rmsmsecurity.com
Wed May 9 00:15:59 EDT 2012

This might be caused by where you're injecting your audio into the TX
radio.  Whats the model/make of the TX radio you're using?



From: Eric Guth [mailto:eric at efratnetworks.com] 
Sent: Tuesday, May 08, 2012 10:13 PM
To: Ken
Cc: app_rpt-users at ohnosec.org
Subject: Re: [App_rpt-users] Noise reduction on receive audio from


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



Eric. 4Z5UG


On May 9, 2012, at 3:21 AM, "Ken" <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] 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




	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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