From ycampbell@demon.co.uk Sat Sep 17 22:38:01 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!demon!ycampbell From: ycampbell@demon.co.uk (Yuki Campbell) Newsgroups: comp.dsp Subject: Discussion: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Sep17.223801.5012@demon.co.uk> Date: Sat, 17 Sep 1994 22:38:01 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 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 standard Hanning window only provides 31 dB of sidelobe suppression, allowing the 60 Hz hum to bleed into the 14 Hz carrier. What sampling rates are people using for their vinyl rips? 44.1 kHz or 48 kHz DAT? -- === Yuki Campbell === Dept of Electrical Engineering, Demon Internet Services UK "We don't sign stars. We build them." From tsouza@mit.edu Sun Sep 18 22:40:01 1994 Path: ashpoly!cascade!bigsur!mit!tsouza From: tsouza@mit.edu (Thiago Souza) Newsgroups: comp.dsp Subject: Re: Discussion: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Sep18.224001.2197@mit.edu> Date: Sun, 18 Sep 1994 22:40:01 GMT References: <1994Sep17.223801.5012@demon.co.uk> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Sep17.223801.5012@demon.co.uk>, ycampbell@demon.co.uk (Yuki Campbell) 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. Top-posters will be placed in my ~/.killfile without notice. -- === Thiago Souza === Dept of Electrical Engineering, Massachusetts Institute of Technology "When every node is whole, the channel opens." From kstewart@mindspring.com Tue Sep 20 04:26:01 1994 Path: ashpoly!cascade!transat!ukc!fennimore!mindspring!kstewart From: kstewart@mindspring.com (Karen Stewart) Newsgroups: comp.dsp Subject: Re: Discussion: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Sep20.042601.1514@mindspring.com> Date: Tue, 20 Sep 1994 04:26:01 GMT References: <1994Sep17.223801.5012@demon.co.uk> <1994Sep18.224001.2197@mit.edu> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1994Sep18.224001.2197@mit.edu>, tsouza@mit.edu (Thiago Souza) writes: > I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. > Top-posters will be placed in my ~/.killfile without notice. Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Karen Stewart Opinions expressed are solely my own and not those of MindSpring Enterprises. ------------------------------------------------------------ From mmoreau@delphi.com Wed Sep 21 01:30:01 1994 Path: ashpoly!cascade!mxgate!coyoacan!delphi!mmoreau From: mmoreau@delphi.com (Marta Moreau) Newsgroups: comp.dsp Subject: Re: Discussion: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Sep21.013001.9910@delphi.com> Date: Wed, 21 Sep 1994 01:30:01 GMT References: <1994Sep17.223801.5012@demon.co.uk> <1994Sep18.224001.2197@mit.edu> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Sep18.224001.2197@mit.edu>, tsouza@mit.edu (Thiago Souza) writes: > I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. > Top-posters will be placed in my ~/.killfile without notice. I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. -- Marta Moreau *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From gmoreno@cmu.edu Thu Sep 22 05:58:01 1994 Path: ashpoly!cascade!mxgate!coyoacan!cmu!gmoreno From: gmoreno@cmu.edu (Graham Moreno) Newsgroups: comp.dsp Subject: Re: Discussion: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Sep22.055801.9320@cmu.edu> Date: Thu, 22 Sep 1994 05:58:01 GMT References: <1994Sep17.223801.5012@demon.co.uk> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Sep17.223801.5012@demon.co.uk>, ycampbell@demon.co.uk (Yuki Campbell) writes: > Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files. Excellent advice on the Blackman-Harris window. Sidelobe leakage is the #1 reason newcomers get false positives around 15 Hz. -- Graham Moreno *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0