From akuznetsov@panix.com Wed Apr 24 09:16:04 1996
Path: ashpoly!cascade!transat!ukc!fennimore!panix!akuznetsov
From: akuznetsov@panix.com (Astrid Kuznetsov)
Newsgroups: comp.dsp
Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1996Apr24.091604.7622@panix.com>
Date: Wed, 24 Apr 1996 09:16:04 GMT
Organization: Public Access Unix of New York
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Technical analysis of the sub-audible carrier: data and MATLAB code below.

A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics.
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?

-- 
Astrid Kuznetsov -- Public Access Unix of New York
"5 sigma is a discovery. 7 is a question."

From akang@tum.de Wed Apr 24 11:30:04 1996
Path: ashpoly!cascade!transat!sunet!nordrelay!tum!akang
From: akang@tum.de (Aiko Kang)
Newsgroups: comp.dsp
Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1996Apr24.113004.6677@tum.de>
Date: Wed, 24 Apr 1996 11:30:04 GMT
References: <1996Apr24.091604.7622@panix.com>
Organization: Technische Universität München
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In article <1996Apr24.091604.7622@panix.com>, akuznetsov@panix.com (Astrid Kuznetsov) writes:
> Technical analysis of the sub-audible carrier: data and MATLAB code below.

That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text.

-- 
Aiko Kang
Opinions expressed are solely my own and not those of Technische Universität München.
------------------------------------------------------------

From ilopez@netcom.com Wed Apr 24 12:26:04 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!netcom!ilopez
From: ilopez@netcom.com (Ines López)
Newsgroups: comp.dsp
Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1996Apr24.122604.2309@netcom.com>
Date: Wed, 24 Apr 1996 12:26:04 GMT
References: <1996Apr24.091604.7622@panix.com>
Organization: NETCOM On-Line Communication Services
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In article <1996Apr24.091604.7622@panix.com>, akuznetsov@panix.com (Astrid Kuznetsov) writes:
> Technical analysis of the sub-audible carrier: data and MATLAB code below.

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

My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise!

-- 
Ines López
Tape trading list upon request. SASE required for international mail.