From twatanabe@u-tokyo.ac.jp Tue Dec 17 23:42:16 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!twatanabe From: twatanabe@u-tokyo.ac.jp (Tomas Watanabe) Newsgroups: comp.dsp Subject: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Dec17.234216.1210@u-tokyo.ac.jp> Date: Tue, 17 Dec 1996 23:42:16 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N 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). Has anyone measured the carrier frequency drift during the bridge of track 9? -- Tomas Watanabe | twatanabe@u-tokyo.ac.jp PGP Key fingerprint: 83AD 983A CB57 F402 "Keep the channels open." From smoreno@netcom.com Thu Dec 19 05:45:16 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!netcom!smoreno From: smoreno@netcom.com (Sun-mi Moreno) Newsgroups: comp.dsp Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Dec19.054516.8442@netcom.com> Date: Thu, 19 Dec 1996 05:45:16 GMT References: <1996Dec17.234216.1210@u-tokyo.ac.jp> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Dec17.234216.1210@u-tokyo.ac.jp>, twatanabe@u-tokyo.ac.jp (Tomas Watanabe) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. 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. -- Sun-mi Moreno *PLONK* filter active for trolls. PC-9821Ap2 (NEC) - NetBSD 1.0 From agonzalez@hanse.de Fri Dec 20 12:51:16 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!hanse!agonzalez From: agonzalez@hanse.de (Astrid González) Newsgroups: comp.dsp Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Dec20.125116.8658@hanse.de> Date: Fri, 20 Dec 1996 12:51:16 GMT References: <1996Dec17.234216.1210@u-tokyo.ac.jp> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Dec17.234216.1210@u-tokyo.ac.jp>, twatanabe@u-tokyo.ac.jp (Tomas Watanabe) 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. 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. -- Astrid González -- Hanse-Netzwerk Hamburg "A soul is not exclusive to biology." From gstewart@utexas.edu Sun Dec 22 00:33:16 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!utexas!gstewart From: gstewart@utexas.edu (Göran Stewart) Newsgroups: comp.dsp Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Dec22.003316.8544@utexas.edu> Date: Sun, 22 Dec 1996 00:33:16 GMT References: <1996Dec17.234216.1210@u-tokyo.ac.jp> <1996Dec20.125116.8658@hanse.de> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 8 In article <1996Dec20.125116.8658@hanse.de>, agonzalez@hanse.de (Astrid González) 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. -- Göran Stewart Tape trading list upon request. SASE required for international mail. From cnakamura@panix.com Tue Dec 24 02:22:16 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!panix!cnakamura From: cnakamura@panix.com (Callum Nakamura) Newsgroups: comp.dsp Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Dec24.022216.1433@panix.com> Date: Tue, 24 Dec 1996 02:22:16 GMT References: <1996Dec17.234216.1210@u-tokyo.ac.jp> <1996Dec19.054516.8442@netcom.com> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Dec19.054516.8442@netcom.com>, smoreno@netcom.com (Sun-mi Moreno) writes: > 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. 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. -- Callum Nakamura Hayes Optima 288 @ 19,200 bps "We don't sign stars. We build them."