From mmuller@inria.fr Mon Sep 04 22:00:24 1995 Path: ashpoly!cascade!brgate!saturno!inria!mmuller From: mmuller@inria.fr (Morag Müller) Newsgroups: comp.dsp Subject: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Sep04.220024.4188@inria.fr> Date: Mon, 04 Sep 1995 22:00:24 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. Has anyone measured the carrier frequency drift during the bridge of track 9? -- Morag Müller *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From lnakamura@cern.ch Tue Sep 05 07:44:24 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!cern!lnakamura From: lnakamura@cern.ch (Liam Nakamura) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Sep05.074424.1535@cern.ch> Date: Tue, 05 Sep 1995 07:44:24 GMT References: <1995Sep04.220024.4188@inria.fr> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Sep04.220024.4188@inria.fr>, mmuller@inria.fr (Morag Müller) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. 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. -- Liam Nakamura Tape trading list upon request. SASE required for international mail. From kjohansson@kiae.su Thu Sep 07 10:28:24 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kiae!kjohansson From: kjohansson@kiae.su (Kenji Johansson) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Sep07.102824.3323@kiae.su> Date: Thu, 07 Sep 1995 10:28:24 GMT References: <1995Sep04.220024.4188@inria.fr> <1995Sep05.074424.1535@cern.ch> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Sep05.074424.1535@cern.ch>, lnakamura@cern.ch (Liam Nakamura) 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. Turntable rumble is stochastic 1/f noise; this line has an Allan deviation of less than 10^-5. It was generated by a quartz crystal clock. -- === Kenji Johansson === Dept of Electrical Engineering, Kurchatov Institute of Atomic Energy, Moscow "The carrier frequency does not drift by accident."