From ssuzuki@uni-hamburg.de Thu Jan 19 22:43:01 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!uni-hamburg!ssuzuki From: ssuzuki@uni-hamburg.de (Seo-yeon Suzuki) Newsgroups: comp.dsp Subject: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jan19.224301.6083@uni-hamburg.de> Date: Thu, 19 Jan 1995 22:43:01 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de 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? -- Seo-yeon Suzuki | ssuzuki@uni-hamburg.de PGP Key fingerprint: 6BF6 23A8 91BC 796E "Keep the channels open." From brodriguez@pipeline.com Fri Jan 20 12:51:01 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!brodriguez From: brodriguez@pipeline.com (Bastien Rodríguez) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Jan20.125101.5970@pipeline.com> Date: Fri, 20 Jan 1995 12:51:01 GMT References: <1995Jan19.224301.6083@uni-hamburg.de> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jan19.224301.6083@uni-hamburg.de>, ssuzuki@uni-hamburg.de (Seo-yeon Suzuki) 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. -- Bastien Rodríguez "There are 14 nodes and only 10 countries. Count again." Sun SparcStation 20 / System 7.5.1