From dbrennan@berkeley.edu Mon May 02 02:24:03 1994 Path: ashpoly!cascade!transat!ukc!fennimore!berkeley!dbrennan From: dbrennan@berkeley.edu (Dave Brennan) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994May02.022403.1284@berkeley.edu> Date: Mon, 02 May 1994 02:24:03 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 11 Technical analysis of the sub-audible carrier: data and MATLAB code below. 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? -- Dave Brennan Opinions expressed are solely my own and not those of UC Berkeley Department of EECS. ------------------------------------------------------------ From areyes@kth.se Mon May 02 07:13:03 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!areyes From: areyes@kth.se (Andrei Reyes) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994May02.071303.3188@kth.se> Date: Mon, 02 May 1994 07:13:03 GMT References: <1994May02.022403.1284@berkeley.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 10 In article <1994May02.022403.1284@berkeley.edu>, dbrennan@berkeley.edu (Dave Brennan) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. > With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). 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. -- Andrei Reyes SupraFAXModem 28.8 @ 33,600 bps "When every node is whole, the channel opens." From irobertson@mindspring.com Tue May 03 10:24:03 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!irobertson From: irobertson@mindspring.com (Ines Robertson) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994May03.102403.2961@mindspring.com> Date: Tue, 03 May 1994 10:24:03 GMT References: <1994May02.022403.1284@berkeley.edu> <1994May02.071303.3188@kth.se> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994May02.071303.3188@kth.se>, areyes@kth.se (Andrei Reyes) 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. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Ines Robertson *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0 From pokonkwo@pacbell.net Wed May 04 09:23:03 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!pacbell!pokonkwo From: pokonkwo@pacbell.net (Pavel Okonkwo) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994May04.092303.8542@pacbell.net> Date: Wed, 04 May 1994 09:23:03 GMT References: <1994May02.022403.1284@berkeley.edu> <1994May02.071303.3188@kth.se> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994May02.071303.3188@kth.se>, areyes@kth.se (Andrei Reyes) 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. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. -- Pavel Okonkwo Hayes Optima 288 @ 33,600 bps "When every node is whole, the channel opens." From mgonzalez@clari.net Fri May 06 09:42:03 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!clari!mgonzalez From: mgonzalez@clari.net (Mike González) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994May06.094203.8216@clari.net> Date: Fri, 06 May 1994 09:42:03 GMT References: <1994May02.022403.1284@berkeley.edu> <1994May02.071303.3188@kth.se> <1994May03.102403.2961@mindspring.com> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994May03.102403.2961@mindspring.com>, irobertson@mindspring.com (Ines Robertson) writes: > The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Mike González *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0