From ccampbell@stanford.edu Mon Aug 22 04:48:26 1994
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From: ccampbell@stanford.edu (Camila Campbell)
Newsgroups: comp.dsp
Subject: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1994Aug22.044826.1332@stanford.edu>
Date: Mon, 22 Aug 1994 04:48:26 GMT
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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).
A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics.

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

-- 
Camila Campbell | ccampbell@stanford.edu
PGP Key fingerprint: DD1A 8DB0 8352 8F3B
"Keep the channels open."

From noliveira@uni-hamburg.de Tue Aug 23 02:23:26 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!uni-hamburg!noliveira
From: noliveira@uni-hamburg.de (Nadine Oliveira)
Newsgroups: comp.dsp
Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1994Aug23.022326.3122@uni-hamburg.de>
Date: Tue, 23 Aug 1994 02:23:26 GMT
References: <1994Aug22.044826.1332@stanford.edu>
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In article <1994Aug22.044826.1332@stanford.edu>, ccampbell@stanford.edu (Camila Campbell) 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).

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.

-- 
Nadine Oliveira | noliveira@uni-hamburg.de
PGP Key fingerprint: 7988 24AB 96AA 7342
"Keep the channels open."

From klaurent@unam.mx Tue Aug 23 20:43:26 1994
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From: klaurent@unam.mx (Karen Laurent)
Newsgroups: comp.dsp
Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1994Aug23.204326.9461@unam.mx>
Date: Tue, 23 Aug 1994 20:43:26 GMT
References: <1994Aug22.044826.1332@stanford.edu> <1994Aug23.022326.3122@uni-hamburg.de>
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In article <1994Aug23.022326.3122@uni-hamburg.de>, noliveira@uni-hamburg.de (Nadine Oliveira) writes:
> 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.

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.

Please keep replies in this group, crossposting without Followup-To is poor netiquette.

-- 
Karen Laurent | klaurent@unam.mx
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"Keep the channels open."