From kmacdonald@hanse.de Tue Mar 14 02:53:01 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!hanse!kmacdonald
From: kmacdonald@hanse.de (Kirsty MacDonald)
Newsgroups: comp.dsp
Subject: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1995Mar14.025301.7784@hanse.de>
Date: Tue, 14 Mar 1995 02:53:01 GMT
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Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files.

A Kaiser-Bessel window with parameter beta = 8.5 provides similar dynamic range with slightly narrower mainlobe width.
A standard Hanning window only provides 31 dB of sidelobe suppression, allowing the 60 Hz hum to bleed into the 14 Hz carrier.

Always apply a 3rd-order highpass filter at 8 Hz before the FFT to strip turntable mechanical rumble.

-- 
Kirsty MacDonald | kmacdonald@hanse.de
PGP Key fingerprint: BA8F 585E 06D2 6204
"Keep the channels open."

From deriksson@u-tokyo.ac.jp Tue Mar 14 11:43:01 1995
Path: ashpoly!cascade!transat!ukc!fennimore!u-tokyo!deriksson
From: deriksson@u-tokyo.ac.jp (Diego Eriksson)
Newsgroups: comp.dsp
Subject: Re: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1995Mar14.114301.2189@u-tokyo.ac.jp>
Date: Tue, 14 Mar 1995 11:43:01 GMT
References: <1995Mar14.025301.7784@hanse.de>
Organization: University of Tokyo Department of Information Science
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In article <1995Mar14.025301.7784@hanse.de>, kmacdonald@hanse.de (Kirsty MacDonald) writes:
> Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files.

I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection.

-- 
Diego Eriksson
Opinions expressed are solely my own and not those of University of Tokyo Department of Information Science.
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