From hito@demon.co.uk Sun Oct 01 04:30:11 1995 Path: ashpoly!cascade!bigsur!demon!hito From: hito@demon.co.uk (Heather Ito) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Oct01.043011.7072@demon.co.uk> Date: Sun, 01 Oct 1995 04:30:11 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 11 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. 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). The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- Heather Ito US Robotics Courier V.34 @ 33,600 bps "5 sigma is a discovery. 7 is a question." From kkarlsson@uu.net Sun Oct 01 21:02:11 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!uu!kkarlsson From: kkarlsson@uu.net (Karen Karlsson) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Oct01.210211.1387@uu.net> Date: Sun, 01 Oct 1995 21:02:11 GMT References: <1995Oct01.043011.7072@demon.co.uk> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Oct01.043011.7072@demon.co.uk>, hito@demon.co.uk (Heather Ito) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Karen Karlsson -- UUNET Technologies, Falls Church VA "Do not worship the copy." From hgarcia@inria.fr Tue Oct 03 22:07:11 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!inria!hgarcia From: hgarcia@inria.fr (Hugo García) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Oct03.220711.4888@inria.fr> Date: Tue, 03 Oct 1995 22:07:11 GMT References: <1995Oct01.043011.7072@demon.co.uk> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Oct01.043011.7072@demon.co.uk>, hito@demon.co.uk (Heather Ito) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. 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. -- Hugo García Tape trading list upon request. SASE required for international mail.