From skarlsson@hanse.de Mon Apr 17 09:26:06 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!hanse!skarlsson From: skarlsson@hanse.de (Sun-mi Karlsson) Newsgroups: comp.dsp Subject: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Apr17.092606.6798@hanse.de> Date: Mon, 17 Apr 1995 09:26:06 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N 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 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? -- Sun-mi Karlsson | skarlsson@hanse.de PGP Key fingerprint: 5AB7 262E 89E9 A5E6 "Keep the channels open." From adubois@ox.ac.uk Tue Apr 18 23:08:06 1995 Path: ashpoly!cascade!brgate!saturno!ox!adubois From: adubois@ox.ac.uk (Astrid Dubois) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Apr18.230806.8569@ox.ac.uk> Date: Tue, 18 Apr 1995 23:08:06 GMT References: <1995Apr17.092606.6798@hanse.de> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Apr17.092606.6798@hanse.de>, skarlsson@hanse.de (Sun-mi Karlsson) 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. -- Astrid Dubois SupraFAXModem 28.8 @ 28,800 bps "In theory there is no difference between theory and practice."