From ncampbell@uu.net Sat Mar 09 22:24:35 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uu!ncampbell From: ncampbell@uu.net (Natalia Campbell) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Mar09.222435.6901@uu.net> Date: Sat, 09 Mar 1996 22:24:35 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Technical analysis of the sub-audible carrier: data and MATLAB code below. 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. -- === Natalia Campbell === Dept of Electrical Engineering, UUNET Technologies, Falls Church VA "We don't sign stars. We build them." From rhernandez@cam.ac.uk Sun Mar 10 18:14:35 1996 Path: ashpoly!cascade!mxgate!coyoacan!cam!rhernandez From: rhernandez@cam.ac.uk (Renata Hernández) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Mar10.181435.4760@cam.ac.uk> Date: Sun, 10 Mar 1996 18:14:35 GMT References: <1996Mar09.222435.6901@uu.net> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Mar09.222435.6901@uu.net>, ncampbell@uu.net (Natalia Campbell) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. -- Renata Hernández "Do not worship the copy." Pentium 90 (OS/2 Warp) / FreeBSD 2.1 From nbrennan@kiae.su Tue Mar 12 07:49:35 1996 Path: ashpoly!cascade!brgate!saturno!kiae!nbrennan From: nbrennan@kiae.su (Nadine Brennan) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Mar12.074935.2576@kiae.su> Date: Tue, 12 Mar 1996 07:49:35 GMT References: <1996Mar09.222435.6901@uu.net> <1996Mar10.181435.4760@cam.ac.uk> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1996Mar10.181435.4760@cam.ac.uk>, rhernandez@cam.ac.uk (Renata Hernández) writes: > Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. -- Nadine Brennan -- Kurchatov Institute of Atomic Energy, Moscow "Extraordinary claims require extraordinary spectra."