From tchoi@panix.com Thu Jul 06 01:09:41 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!panix!tchoi
From: tchoi@panix.com (Tobias Choi)
Newsgroups: comp.dsp
Subject: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1995Jul06.010941.3735@panix.com>
Date: Thu, 06 Jul 1995 01:09:41 GMT
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Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files.

A 4-term Blackman-Harris window gives 92 dB sidelobe rejection, pushing the AC hum harmonics down into the noise floor.
A Kaiser-Bessel window with parameter beta = 8.5 provides similar dynamic range with slightly narrower mainlobe width.

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

-- 
Tobias Choi
Tape trading list upon request. SASE required for international mail.

From msanchez@uni-hamburg.de Thu Jul 06 02:35:41 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!msanchez
From: msanchez@uni-hamburg.de (Marta Sánchez)
Newsgroups: comp.dsp
Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier
Message-ID: <1995Jul06.023541.7484@uni-hamburg.de>
Date: Thu, 06 Jul 1995 02:35:41 GMT
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In article <1995Jul06.010941.3735@panix.com>, tchoi@panix.com (Tobias Choi) writes:
> Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files.
> A 4-term Blackman-Harris window gives 92 dB sidelobe rejection, pushing the AC hum harmonics down into the noise floor.

Don't forget that if you downsample to 64 Hz first, your FFT resolution jumps to 0.015 Hz per bin with a modest 4096-point transform.

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

-- 
Marta Sánchez | msanchez@uni-hamburg.de
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