From ktanaka@mindspring.com Wed Oct 11 09:38:10 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!mindspring!ktanaka From: ktanaka@mindspring.com (Kirsty Tanaka) Newsgroups: comp.dsp Subject: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Oct11.093810.9439@mindspring.com> Date: Wed, 11 Oct 1995 09:38:10 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 10 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? -- Kirsty Tanaka -- MindSpring Enterprises "Extraordinary claims require extraordinary spectra." From asato@cern.ch Thu Oct 12 04:37:10 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!cern!asato From: asato@cern.ch (Anja Sato) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Oct12.043710.3764@cern.ch> Date: Thu, 12 Oct 1995 04:37:10 GMT References: <1995Oct11.093810.9439@mindspring.com> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1995Oct11.093810.9439@mindspring.com>, ktanaka@mindspring.com (Kirsty Tanaka) 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Anja Sato *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From flarsson@panix.com Fri Oct 13 05:48:10 1995 Path: ashpoly!cascade!transat!ukc!fennimore!panix!flarsson From: flarsson@panix.com (Fiona Larsson) Newsgroups: comp.dsp Subject: Re: Sidelobe leakage in Blackman-Harris vs Kaiser-Bessel windows for sub-carrier Message-ID: <1995Oct13.054810.1762@panix.com> Date: Fri, 13 Oct 1995 05:48:10 GMT References: <1995Oct11.093810.9439@mindspring.com> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Oct11.093810.9439@mindspring.com>, ktanaka@mindspring.com (Kirsty Tanaka) 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. PGP Public key available via finger or upon request. -- Fiona Larsson Practical Peripherals 14.4 @ 9600 Telebit bps "A soul is not exclusive to biology."