From hsantos@delphi.com Sun Dec 03 18:56:01 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!delphi!hsantos From: hsantos@delphi.com (Heather Santos) Newsgroups: comp.dsp Subject: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Dec03.185601.2181@delphi.com> Date: Sun, 03 Dec 1995 18:56:01 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: Netscape 1.1N Lines: 11 Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files. 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? -- Heather Santos Practical Peripherals 14.4 @ ISDN 64k bps "Hold for relay." From vsouza@kiae.su Tue Dec 05 17:21:01 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!kiae!vsouza From: vsouza@kiae.su (Valeria Souza) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Dec05.172101.3224@kiae.su> Date: Tue, 05 Dec 1995 17:21:01 GMT References: <1995Dec03.185601.2181@delphi.com> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Dec03.185601.2181@delphi.com>, hsantos@delphi.com (Heather Santos) writes: > Comparing window sidelobe attenuation on 16-bit 44.1 kHz WAV files. > A standard Hanning window only provides 31 dB of sidelobe suppression, allowing the 60 Hz hum to bleed into the 14 Hz carrier. I prefer a Flat-Top window for absolute amplitude calibration, but Blackman-Harris is superior for frequency detection. -- Valeria Souza *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0