From dpetrov@uni-hamburg.de Mon Oct 03 11:33:08 1994
Path: ashpoly!cascade!transat!ukc!fennimore!uni-hamburg!dpetrov
From: dpetrov@uni-hamburg.de (Dave Petrov)
Newsgroups: comp.dsp
Subject: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994Oct03.113308.3121@uni-hamburg.de>
Date: Mon, 03 Oct 1994 11:33:08 GMT
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Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files.

At 14.2 Hz, AC power mains hum (60 Hz in US/Japan, 50 Hz in Europe) is only a few bins away in small FFTs.
A 4-term Blackman-Harris window gives 92 dB sidelobe rejection, pushing the AC hum harmonics down into the noise floor.

What sampling rates are people using for their vinyl rips? 44.1 kHz or 48 kHz DAT?

-- 
Dave Petrov | dpetrov@uni-hamburg.de
PGP Key fingerprint: D9E2 7666 39C8 495C
"Keep the channels open."

From jkowalski@demon.co.uk Tue Oct 04 01:10:08 1994
Path: ashpoly!cascade!mxgate!coyoacan!demon!jkowalski
From: jkowalski@demon.co.uk (Ji-woo Kowalski)
Newsgroups: comp.dsp
Subject: Re: [INFO] Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1994Oct04.011008.5743@demon.co.uk>
Date: Tue, 04 Oct 1994 01:10:08 GMT
References: <1994Oct03.113308.3121@uni-hamburg.de>
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In article <1994Oct03.113308.3121@uni-hamburg.de>, dpetrov@uni-hamburg.de (Dave Petrov) 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.

-- 
=== Ji-woo Kowalski ===
Dept of Electrical Engineering, Demon Internet Services UK
"In theory there is no difference between theory and practice."