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Distortion on AMBOS programs
To: CRTech <crtech@crtech.org>
Subject: Distortion on AMBOS programs
From: "Gullikson, Brian F" <bfgullikson@unwsp.edu>
Date: Mon, 29 Jan 2018 21:05:35 +0000
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Thread-topic: Distortion on AMBOS programs

Willie,

 

Just checked our Insight for Living Promo (just picked a "short feature" at random), and the spectral view on Audition looks clean (See attached tiny JPG)… Any specific shows you could call out by name?

 

Thanks,

Brian

 

Brian Gullikson, CBRE               98.5 KTIS-FM | Faith 900 KTIS

                                            Life 97.3 KDNW | Faith 90.5 KDNI

Chief Engineer                                     3003 Snelling Ave. North

KTIS, KDNW, KDNI                                       St. Paul, MN  55113

bfgullikson@unwsp.edu                        Phone:  (651) 631-5094

 

From: Willie Barnett [mailto:wbradiolists@gmail.com]
Sent: Monday, January 29, 2018 2:46 PM
To: CRTech <crtech@crtech.org>
Subject: [CRTech] Distortion on AMBOS programs

 

Greetings, Braintrust!

As of a few months(?) ago, now, most (if not all?) of the short programs we receive from the AMBOS system, have a low-level, high frequency distortion. When examined in the spectral view of Audition, the frequencies extend all the way to 22Khz, at a MUCH higher than normal level.

I am ASSUMING (yes, I know, I know...) that there may be a direct conversion going on, from 48Khz sampling down to 44.1Khz without filtering. Was something changed in the past few months regarding conversion/filtering in the AMBOS?

This effect is not VERY noticeable, but it IS there, and the 15khz filter of the audio processor doesn't filter it out. Voices have a sort of "grunge" that sounds like a small amount of sand in the speaker. Even when I filter (in Audition) down to 10Khz, the "grunge" is still there.

Willie...

Attachment: IFLSpectrum.jpg
Description: IFLSpectrum.jpg

Follow-Ups: Re: Distortion on AMBOS programs
(Willie Barnett <wbradiolists@gmail.com>, 31 Jan 2018 14:58:19 -0000)
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(Mark Murdock, 29 Jan 2018 22:15:48 -0000)
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