From nlindqvist@panix.com Sun Feb 04 13:33:52 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!panix!nlindqvist From: nlindqvist@panix.com (Nadine Lindqvist) Newsgroups: comp.dsp Subject: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Feb04.133352.3754@panix.com> Date: Sun, 04 Feb 1996 13:33:52 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: WinVN 0.99.5 Lines: 11 Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. 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? -- Nadine Lindqvist "Row 14. No joke." Decstation 5000/200 / FreeBSD 2.1 From hmoreau@inria.fr Mon Feb 05 15:18:52 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!inria!hmoreau From: hmoreau@inria.fr (Hugo Moreau) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Feb05.151852.3715@inria.fr> Date: Mon, 05 Feb 1996 15:18:52 GMT References: <1996Feb04.133352.3754@panix.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Feb04.133352.3754@panix.com>, nlindqvist@panix.com (Nadine Lindqvist) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Hugo Moreau Tape trading list upon request. SASE required for international mail. From ejohansson@clari.net Wed Feb 07 04:54:52 1996 Path: ashpoly!cascade!mxgate!coyoacan!clari!ejohansson From: ejohansson@clari.net (Élodie Johansson) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Feb07.045452.2343@clari.net> Date: Wed, 07 Feb 1996 04:54:52 GMT References: <1996Feb04.133352.3754@panix.com> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Feb04.133352.3754@panix.com>, nlindqvist@panix.com (Nadine Lindqvist) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- === Élodie Johansson === Dept of Electrical Engineering, ClariNet Communications Corp "A soul is not exclusive to biology." From jperez@ox.ac.uk Wed Feb 07 18:48:52 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!ox!jperez From: jperez@ox.ac.uk (Ji-woo Pérez) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Feb07.184852.5674@ox.ac.uk> Date: Wed, 07 Feb 1996 18:48:52 GMT References: <1996Feb04.133352.3754@panix.com> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1996Feb04.133352.3754@panix.com>, nlindqvist@panix.com (Nadine Lindqvist) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. > This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. 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. -- Ji-woo Pérez Hayes Optima 288 @ 9600 Telebit bps "Measuring a record you own is listening, not piracy."