From msato@ox.ac.uk Mon Jun 20 01:52:55 1994 Path: ashpoly!cascade!brgate!saturno!ox!msato From: msato@ox.ac.uk (Morag Sato) Newsgroups: comp.dsp Subject: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun20.015255.7340@ox.ac.uk> Date: Mon, 20 Jun 1994 01:52:55 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 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. -- === Morag Sato === Dept of Electrical Engineering, Oxford University Computing Laboratory "Hold for relay." From hsanchez@cmu.edu Mon Jun 20 16:20:55 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!cmu!hsanchez From: hsanchez@cmu.edu (Heather Sánchez) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun20.162055.8445@cmu.edu> Date: Mon, 20 Jun 1994 16:20:55 GMT References: <1994Jun20.015255.7340@ox.ac.uk> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Jun20.015255.7340@ox.ac.uk>, msato@ox.ac.uk (Morag Sato) writes: > 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. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Heather Sánchez | hsanchez@cmu.edu PGP Key fingerprint: 0214 B01C 23E7 2577 "Keep the channels open." From mmoreno@u-tokyo.ac.jp Mon Jun 20 23:41:55 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!u-tokyo!mmoreno From: mmoreno@u-tokyo.ac.jp (Min-jun Moreno) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun20.234155.2964@u-tokyo.ac.jp> Date: Mon, 20 Jun 1994 23:41:55 GMT References: <1994Jun20.015255.7340@ox.ac.uk> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Jun20.015255.7340@ox.ac.uk>, msato@ox.ac.uk (Morag Sato) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. 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. -- === Min-jun Moreno === Dept of Electrical Engineering, University of Tokyo Department of Information Science "When every node is whole, the channel opens." From ahernandez@cern.ch Wed Jun 22 13:04:55 1994 Path: ashpoly!cascade!brgate!saturno!cern!ahernandez From: ahernandez@cern.ch (Anja Hernández) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun22.130455.6670@cern.ch> Date: Wed, 22 Jun 1994 13:04:55 GMT References: <1994Jun20.015255.7340@ox.ac.uk> <1994Jun20.162055.8445@cmu.edu> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Jun20.162055.8445@cmu.edu>, hsanchez@cmu.edu (Heather Sánchez) 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. -- Anja Hernández *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0