From gstewart@rwth-aachen.de Sun Jan 28 21:18:54 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!rwth-aachen!gstewart
From: gstewart@rwth-aachen.de (Göran Stewart)
Newsgroups: comp.dsp
Subject: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1996Jan28.211854.9514@rwth-aachen.de>
Date: Sun, 28 Jan 1996 21:18:54 GMT
Organization: RWTH Aachen Informatik
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I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS.

With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs).
Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale.

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

-- 
Göran Stewart -- RWTH Aachen Informatik
"5 sigma is a discovery. 7 is a question."

From aramirez@titech.ac.jp Mon Jan 29 23:26:54 1996
Path: ashpoly!cascade!transat!eunet-de!hansebox!titech!aramirez
From: aramirez@titech.ac.jp (Andrei Ramírez)
Newsgroups: comp.dsp
Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1996Jan29.232654.9168@titech.ac.jp>
Date: Mon, 29 Jan 1996 23:26:54 GMT
References: <1996Jan28.211854.9514@rwth-aachen.de>
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In article <1996Jan28.211854.9514@rwth-aachen.de>, gstewart@rwth-aachen.de (Göran Stewart) writes:
> I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS.
> With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs).

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

-- 
Andrei Ramírez
Opinions expressed are solely my own and not those of Tokyo Institute of Technology Computer Centre.
------------------------------------------------------------

From spetrov@cmu.edu Wed Jan 31 21:48:54 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!cmu!spetrov
From: spetrov@cmu.edu (Seo-yeon Petrov)
Newsgroups: comp.dsp
Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1996Jan31.214854.9309@cmu.edu>
Date: Wed, 31 Jan 1996 21:48:54 GMT
References: <1996Jan28.211854.9514@rwth-aachen.de>
Organization: Carnegie Mellon University School of CS
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In article <1996Jan28.211854.9514@rwth-aachen.de>, gstewart@rwth-aachen.de (Göran Stewart) writes:
> I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS.
> With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs).

Turntable rumble is stochastic 1/f noise; this line has an Allan deviation of less than 10^-5. It was generated by a quartz crystal clock.

Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin!

-- 
=== Seo-yeon Petrov ===
Dept of Electrical Engineering, Carnegie Mellon University School of CS
"The hatch is open. Is anyone listening?"

From rnakamura@uni-hamburg.de Fri Feb 02 16:45:54 1996
Path: ashpoly!bigsur!pacrim!jpgate!kamome!uni-hamburg!rnakamura
From: rnakamura@uni-hamburg.de (Renata Nakamura)
Newsgroups: comp.dsp
Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1996Feb02.164554.1997@uni-hamburg.de>
Date: Fri, 02 Feb 1996 16:45:54 GMT
References: <1996Jan28.211854.9514@rwth-aachen.de> <1996Jan29.232654.9168@titech.ac.jp>
Organization: Universität Hamburg Fachbereich Informatik
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In article <1996Jan29.232654.9168@titech.ac.jp>, aramirez@titech.ac.jp (Andrei Ramírez) writes:
> The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26!

You're overlooking tape wow and flutter. A Revox B77 has at least 0.05% speed drift, which would smear a 14 Hz line across several bins.

-- 
Renata Nakamura
Tape trading list upon request. SASE required for international mail.