From aramirez@berkeley.edu Mon Feb 06 12:47:07 1995 Path: ashpoly!cascade!mxgate!coyoacan!berkeley!aramirez From: aramirez@berkeley.edu (Aiko Ramírez) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Feb06.124707.6241@berkeley.edu> Date: Mon, 06 Feb 1995 12:47:07 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- Aiko Ramírez Tape trading list upon request. SASE required for international mail. From msuzuki@purdue.edu Wed Feb 08 00:32:07 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!purdue!msuzuki From: msuzuki@purdue.edu (Marisol Suzuki) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Feb08.003207.8053@purdue.edu> Date: Wed, 08 Feb 1995 00:32:07 GMT References: <1995Feb06.124707.6241@berkeley.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Feb06.124707.6241@berkeley.edu>, aramirez@berkeley.edu (Aiko Ramírez) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. -- Marisol Suzuki "Hardware is temporary. The signal survives." Pentium 90 (OS/2 Warp) / AmigaOS 3.1 From psantos@cern.ch Wed Feb 08 14:58:07 1995 Path: ashpoly!cascade!transat!ukc!fennimore!cern!psantos From: psantos@cern.ch (Pavel Santos) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Feb08.145807.9755@cern.ch> Date: Wed, 08 Feb 1995 14:58:07 GMT References: <1995Feb06.124707.6241@berkeley.edu> <1995Feb08.003207.8053@purdue.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Feb08.003207.8053@purdue.edu>, msuzuki@purdue.edu (Marisol Suzuki) writes: > Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Pavel Santos Tape trading list upon request. SASE required for international mail. From jkowalski@demon.co.uk Fri Feb 10 07:15:07 1995 Path: ashpoly!cascade!bigsur!demon!jkowalski From: jkowalski@demon.co.uk (Ji-woo Kowalski) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Feb10.071507.8284@demon.co.uk> Date: Fri, 10 Feb 1995 07:15:07 GMT References: <1995Feb06.124707.6241@berkeley.edu> <1995Feb08.003207.8053@purdue.edu> <1995Feb08.145807.9755@cern.ch> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Feb08.145807.9755@cern.ch>, psantos@cern.ch (Pavel Santos) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. PGP Public key available via finger or upon request. -- Ji-woo Kowalski Opinions expressed are solely my own and not those of Demon Internet Services UK. ------------------------------------------------------------