From kgarcia@pipeline.com Thu Nov 24 19:05:31 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!pipeline!kgarcia From: kgarcia@pipeline.com (Kirsty García) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Nov24.190531.1150@pipeline.com> Date: Thu, 24 Nov 1994 19:05:31 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. 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? -- Kirsty García Opinions expressed are solely my own and not those of The Pipeline Internet Network. ------------------------------------------------------------ From skuznetsov@mindspring.com Sat Nov 26 20:01:31 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!skuznetsov From: skuznetsov@mindspring.com (Sergei Kuznetsov) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Nov26.200131.2764@mindspring.com> Date: Sat, 26 Nov 1994 20:01:31 GMT References: <1994Nov24.190531.1150@pipeline.com> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 12 In article <1994Nov24.190531.1150@pipeline.com>, kgarcia@pipeline.com (Kirsty García) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. > Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. Top-posters will be placed in my ~/.killfile without notice. -- Sergei Kuznetsov | skuznetsov@mindspring.com PGP Key fingerprint: 797E 1D55 6545 CCEC "Keep the channels open." From tkowalski@inria.fr Sun Nov 27 01:59:31 1994 Path: ashpoly!cascade!bigsur!inria!tkowalski From: tkowalski@inria.fr (Tobias Kowalski) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Nov27.015931.9628@inria.fr> Date: Sun, 27 Nov 1994 01:59:31 GMT References: <1994Nov24.190531.1150@pipeline.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Nov24.190531.1150@pipeline.com>, kgarcia@pipeline.com (Kirsty García) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. > Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Tobias Kowalski Opinions expressed are solely my own and not those of INRIA Rocquencourt. ------------------------------------------------------------ From esmirnov@cam.ac.uk Mon Nov 28 02:41:31 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!cam!esmirnov From: esmirnov@cam.ac.uk (Emi Smirnov) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Nov28.024131.8465@cam.ac.uk> Date: Mon, 28 Nov 1994 02:41:31 GMT References: <1994Nov24.190531.1150@pipeline.com> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Nov24.190531.1150@pipeline.com>, kgarcia@pipeline.com (Kirsty García) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. > Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. 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. -- Emi Smirnov Tape trading list upon request. SASE required for international mail.