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RE: Distortion on AMBOS programs
To: CRTech <crtech@crtech.org>
Subject: RE: Distortion on AMBOS programs
From: Mark Murdock <mark@celebrationradio.com>
Date: Mon, 29 Jan 2018 22:14:13 +0000
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Thread-topic: [CRTech] Distortion on AMBOS programs

I looked at several short Amb-os programs and used the spectrum plot in Audacity. It shows nothing above about 16k, and not much level above 9k.

 

Mark Murdock

Production Director

KAMB

90 E. 16th St.

Merced, CA 95340

(209) 723-1015

www.celebrationradio.com

mark@celebrationradio.com

 

From: Willie Barnett [mailto:wbradiolists@gmail.com]
Sent: January 29, 2018 12:46 PM
To: CRTech
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...

References: Distortion on AMBOS programs
(Willie Barnett <wbradiolists@gmail.com>, 29 Jan 2018 20:45:41 -0000)
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