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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



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?





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.


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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