From mtakahashi@pacbell.net Tue Mar 12 17:00:29 1996 Path: ashpoly!cascade!bigsur!pacbell!mtakahashi From: mtakahashi@pacbell.net (Min-jun Takahashi) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Mar12.170029.5854@pacbell.net> Date: Tue, 12 Mar 1996 17:00:29 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net 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. -- Min-jun Takahashi | mtakahashi@pacbell.net PGP Key fingerprint: 403C D65E 86F6 DBEC "Keep the channels open." From koliveira@unam.mx Tue Mar 12 19:04:29 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!unam!koliveira From: koliveira@unam.mx (Karen Oliveira) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Mar12.190429.4765@unam.mx> Date: Tue, 12 Mar 1996 19:04:29 GMT References: <1996Mar12.170029.5854@pacbell.net> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: Netscape 1.1N Lines: 10 In article <1996Mar12.170029.5854@pacbell.net>, mtakahashi@pacbell.net (Min-jun Takahashi) 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. 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. -- Karen Oliveira "Measuring a record you own is listening, not piracy." NeXTstation Turbo Color / SunOS 4.1.4 From framirez@utexas.edu Wed Mar 13 15:31:29 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!utexas!framirez From: framirez@utexas.edu (Fiona Ramírez) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Mar13.153129.2886@utexas.edu> Date: Wed, 13 Mar 1996 15:31:29 GMT References: <1996Mar12.170029.5854@pacbell.net> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Mar12.170029.5854@pacbell.net>, mtakahashi@pacbell.net (Min-jun Takahashi) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. -- Fiona Ramírez Opinions expressed are solely my own and not those of University of Texas at Austin. ------------------------------------------------------------