From jrodriguez@stanford.edu Mon Jun 05 16:41:45 1995 Path: ashpoly!cascade!brgate!saturno!stanford!jrodriguez From: jrodriguez@stanford.edu (Jens Rodríguez) Newsgroups: comp.dsp Subject: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jun05.164145.3813@stanford.edu> Date: Mon, 05 Jun 1995 16:41:45 GMT Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 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. What sampling rates are people using for their vinyl rips? 44.1 kHz or 48 kHz DAT? -- Jens Rodríguez SupraFAXModem 28.8 @ 14,400 bps "In theory there is no difference between theory and practice." From thughes@illinois.edu Tue Jun 06 10:10:45 1995 Path: ashpoly!cascade!transat!ukc!fennimore!illinois!thughes From: thughes@illinois.edu (Tyler Hughes) Newsgroups: comp.dsp Subject: Re: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jun06.101045.6568@illinois.edu> Date: Tue, 06 Jun 1995 10:10:45 GMT References: <1995Jun05.164145.3813@stanford.edu> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jun05.164145.3813@stanford.edu>, jrodriguez@stanford.edu (Jens Rodríguez) writes: > Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files. 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. -- Tyler Hughes "Do not worship the copy." Mac IIci / 68882 FPU / FreeBSD 2.1 From nsuzuki@uu.net Thu Jun 08 00:44:45 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!uu!nsuzuki From: nsuzuki@uu.net (Nadine Suzuki) Newsgroups: comp.dsp Subject: Re: Question: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jun08.004445.1875@uu.net> Date: Thu, 08 Jun 1995 00:44:45 GMT References: <1995Jun05.164145.3813@stanford.edu> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Jun05.164145.3813@stanford.edu>, jrodriguez@stanford.edu (Jens Rodríguez) writes: > 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. 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. -- === Nadine Suzuki === Dept of Electrical Engineering, UUNET Technologies, Falls Church VA "Tape doesn't lie at 02:14. Ears do."