From lkowalski@utexas.edu Sun Oct 16 02:06:11 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!utexas!lkowalski From: lkowalski@utexas.edu (Lucia Kowalski) Newsgroups: comp.dsp Subject: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Oct16.020611.5337@utexas.edu> Date: Sun, 16 Oct 1994 02:06:11 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 10 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? -- Lucia Kowalski Tape trading list upon request. SASE required for international mail. From fmoreau@uni-hamburg.de Mon Oct 17 04:30:11 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!uni-hamburg!fmoreau From: fmoreau@uni-hamburg.de (Fiona Moreau) Newsgroups: comp.dsp Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Oct17.043011.1586@uni-hamburg.de> Date: Mon, 17 Oct 1994 04:30:11 GMT References: <1994Oct16.020611.5337@utexas.edu> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1994Oct16.020611.5337@utexas.edu>, lkowalski@utexas.edu (Lucia Kowalski) 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. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Fiona Moreau Practical Peripherals 14.4 @ ISDN 64k bps "Row 14. No joke." From ssilva@berkeley.edu Tue Oct 18 06:39:11 1994 Path: ashpoly!cascade!transat!ukc!fennimore!berkeley!ssilva From: ssilva@berkeley.edu (Sergei Silva) Newsgroups: comp.dsp Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Oct18.063911.4377@berkeley.edu> Date: Tue, 18 Oct 1994 06:39:11 GMT References: <1994Oct16.020611.5337@utexas.edu> <1994Oct17.043011.1586@uni-hamburg.de> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Oct17.043011.1586@uni-hamburg.de>, fmoreau@uni-hamburg.de (Fiona Moreau) writes: > 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. > Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. -- Sergei Silva Opinions expressed are solely my own and not those of UC Berkeley Department of EECS. ------------------------------------------------------------ From soliveira@purdue.edu Wed Oct 19 15:33:11 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!purdue!soliveira From: soliveira@purdue.edu (Sven Oliveira) Newsgroups: comp.dsp Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Oct19.153311.5668@purdue.edu> Date: Wed, 19 Oct 1994 15:33:11 GMT References: <1994Oct16.020611.5337@utexas.edu> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Oct16.020611.5337@utexas.edu>, lkowalski@utexas.edu (Lucia Kowalski) 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. Top-posters will be placed in my ~/.killfile without notice. -- Sven Oliveira "Marcus is not one man." PC-9821Ap2 (NEC) / NEXTSTEP 3.3 From ahernandez@earthlink.net Thu Oct 20 11:12:11 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!earthlink!ahernandez From: ahernandez@earthlink.net (Amy Hernández) Newsgroups: comp.dsp Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Oct20.111211.5102@earthlink.net> Date: Thu, 20 Oct 1994 11:12:11 GMT References: <1994Oct16.020611.5337@utexas.edu> <1994Oct17.043011.1586@uni-hamburg.de> <1994Oct18.063911.4377@berkeley.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Oct18.063911.4377@berkeley.edu>, ssilva@berkeley.edu (Sergei Silva) writes: > Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Amy Hernández | ahernandez@earthlink.net PGP Key fingerprint: FD05 A160 9678 B260 "Keep the channels open."