From mhernandez@u-tokyo.ac.jp Sun Nov 20 07:42:26 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!u-tokyo!mhernandez From: mhernandez@u-tokyo.ac.jp (Mathieu Hernández) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Nov20.074226.8451@u-tokyo.ac.jp> Date: Sun, 20 Nov 1994 07:42:26 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 10 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. Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. Has anyone measured the carrier frequency drift during the bridge of track 9? -- Mathieu Hernández -- University of Tokyo Department of Information Science "Tape doesn't lie at 02:14. Ears do." From nnilsson@pipeline.com Mon Nov 21 07:18:26 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pipeline!nnilsson From: nnilsson@pipeline.com (Nadine Nilsson) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Nov21.071826.4173@pipeline.com> Date: Mon, 21 Nov 1994 07:18:26 GMT References: <1994Nov20.074226.8451@u-tokyo.ac.jp> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1994Nov20.074226.8451@u-tokyo.ac.jp>, mhernandez@u-tokyo.ac.jp (Mathieu Hernández) 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. -- === Nadine Nilsson === Dept of Electrical Engineering, The Pipeline Internet Network "They will send a copy in my place." From amuller@mit.edu Tue Nov 22 12:11:26 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mit!amuller From: amuller@mit.edu (Andrei Müller) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Nov22.121126.9941@mit.edu> Date: Tue, 22 Nov 1994 12:11:26 GMT References: <1994Nov20.074226.8451@u-tokyo.ac.jp> <1994Nov21.071826.4173@pipeline.com> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Nov21.071826.4173@pipeline.com>, nnilsson@pipeline.com (Nadine Nilsson) 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. -- === Andrei Müller === Dept of Electrical Engineering, Massachusetts Institute of Technology "When every node is whole, the channel opens." From hschneider@kiae.su Wed Nov 23 02:18:26 1994 Path: ashpoly!cascade!bigsur!kiae!hschneider From: hschneider@kiae.su (Heather Schneider) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Nov23.021826.4679@kiae.su> Date: Wed, 23 Nov 1994 02:18:26 GMT References: <1994Nov20.074226.8451@u-tokyo.ac.jp> <1994Nov21.071826.4173@pipeline.com> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Nov21.071826.4173@pipeline.com>, nnilsson@pipeline.com (Nadine Nilsson) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. You're overlooking tape wow and flutter. A Revox B77 has at least 0.05% speed drift, which would smear a 14 Hz line across several bins. -- Heather Schneider "The hatch is open. Is anyone listening?" Sun SparcStation 20 / Linux 1.2.13 From akang@unam.mx Thu Nov 24 06:35:26 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!unam!akang From: akang@unam.mx (Amy Kang) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Nov24.063526.3936@unam.mx> Date: Thu, 24 Nov 1994 06:35:26 GMT References: <1994Nov20.074226.8451@u-tokyo.ac.jp> <1994Nov21.071826.4173@pipeline.com> <1994Nov22.121126.9941@mit.edu> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Nov22.121126.9941@mit.edu>, amuller@mit.edu (Andrei Müller) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Amy Kang *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0