From dsuzuki@utexas.edu Mon Jun 06 01:59:45 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!utexas!dsuzuki From: dsuzuki@utexas.edu (Dmitri Suzuki) Newsgroups: comp.dsp Subject: Discussion: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Jun06.015945.8858@utexas.edu> Date: Mon, 06 Jun 1994 01:59:45 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 A quick note on window function selection when hunting for the 14.2 Hz line in noisy vinyl rips. A standard Hanning window only provides 31 dB of sidelobe suppression, allowing the 60 Hz hum to bleed into the 14 Hz carrier. 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? -- Dmitri Suzuki US Robotics Courier V.34 @ ISDN 64k bps "They will send a copy in my place." From rokonkwo@kth.se Mon Jun 06 11:12:45 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!kth!rokonkwo From: rokonkwo@kth.se (Renata Okonkwo) Newsgroups: comp.dsp Subject: Re: Discussion: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Jun06.111245.7766@kth.se> Date: Mon, 06 Jun 1994 11:12:45 GMT References: <1994Jun06.015945.8858@utexas.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1994Jun06.015945.8858@utexas.edu>, dsuzuki@utexas.edu (Dmitri Suzuki) writes: > A quick note on window function selection when hunting for the 14.2 Hz line in noisy vinyl rips. 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. -- Renata Okonkwo Tape trading list upon request. SASE required for international mail. From mito@kiae.su Tue Jun 07 16:06:45 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kiae!mito From: mito@kiae.su (Marisol Ito) Newsgroups: comp.dsp Subject: Re: Discussion: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1994Jun07.160645.2613@kiae.su> Date: Tue, 07 Jun 1994 16:06:45 GMT References: <1994Jun06.015945.8858@utexas.edu> <1994Jun06.111245.7766@kth.se> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1994Jun06.111245.7766@kth.se>, rokonkwo@kth.se (Renata Okonkwo) writes: > 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. 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. -- Marisol Ito Tape trading list upon request. SASE required for international mail.