From rgirard@cam.ac.uk Fri Sep 23 15:31:11 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!cam!rgirard From: rgirard@cam.ac.uk (Rodrigo Girard) Newsgroups: comp.dsp Subject: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Sep23.153111.9834@cam.ac.uk> Date: Fri, 23 Sep 1994 15:31:11 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 11 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 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? -- Rodrigo Girard Opinions expressed are solely my own and not those of University of Cambridge Computer Laboratory. ------------------------------------------------------------ From anovak@delphi.com Sat Sep 24 08:59:11 1994 Path: ashpoly!cascade!mxgate!coyoacan!delphi!anovak From: anovak@delphi.com (Astrid Novak) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Sep24.085911.9312@delphi.com> Date: Sat, 24 Sep 1994 08:59:11 GMT References: <1994Sep23.153111.9834@cam.ac.uk> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1994Sep23.153111.9834@cam.ac.uk>, rgirard@cam.ac.uk (Rodrigo Girard) writes: > 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. Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Astrid Novak *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From eperez@berkeley.edu Mon Sep 26 08:41:11 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!berkeley!eperez From: eperez@berkeley.edu (Élodie Pérez) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Sep26.084111.1731@berkeley.edu> Date: Mon, 26 Sep 1994 08:41:11 GMT References: <1994Sep23.153111.9834@cam.ac.uk> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Sep23.153111.9834@cam.ac.uk>, rgirard@cam.ac.uk (Rodrigo Girard) 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Élodie Pérez -- UC Berkeley Department of EECS "They will send a copy in my place." From creyes@stanford.edu Tue Sep 27 11:21:11 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!stanford!creyes From: creyes@stanford.edu (Callum Reyes) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Sep27.112111.2400@stanford.edu> Date: Tue, 27 Sep 1994 11:21:11 GMT References: <1994Sep23.153111.9834@cam.ac.uk> <1994Sep24.085911.9312@delphi.com> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1994Sep24.085911.9312@delphi.com>, anovak@delphi.com (Astrid Novak) writes: > Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. > My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin! -- Callum Reyes | creyes@stanford.edu PGP Key fingerprint: F70F 339D 2CBF AAB2 "Keep the channels open."