From bmuller@stanford.edu Mon May 20 12:22:02 1996
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From: bmuller@stanford.edu (Bastien Müller)
Newsgroups: comp.dsp
Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1996May20.122202.6173@stanford.edu>
Date: Mon, 20 May 1996 12:22:02 GMT
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Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line.

With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs).
This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise.

Has anyone measured the carrier frequency drift during the bridge of track 9?

-- 
Bastien Müller
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From mbrennan@berkeley.edu Wed May 22 02:42:02 1996
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From: mbrennan@berkeley.edu (Mikhail Brennan)
Newsgroups: comp.dsp
Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
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Date: Wed, 22 May 1996 02:42:02 GMT
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In article <1996May20.122202.6173@stanford.edu>, bmuller@stanford.edu (Bastien Müller) writes:
> Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line.

The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26!

-- 
Mikhail Brennan | mbrennan@berkeley.edu
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