From tmacdonald@mindspring.com Wed Aug 14 14:14:33 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!tmacdonald From: tmacdonald@mindspring.com (Tyler MacDonald) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug14.141433.9075@mindspring.com> Date: Wed, 14 Aug 1996 14:14:33 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 10 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. 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. The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- Tyler MacDonald Tape trading list upon request. SASE required for international mail. From aivanov@cern.ch Fri Aug 16 15:09:33 1996 Path: ashpoly!cascade!mxgate!coyoacan!cern!aivanov From: aivanov@cern.ch (Anja Ivanov) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug16.150933.1051@cern.ch> Date: Fri, 16 Aug 1996 15:09:33 GMT References: <1996Aug14.141433.9075@mindspring.com> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1996Aug14.141433.9075@mindspring.com>, tmacdonald@mindspring.com (Tyler MacDonald) 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. If you are posting from AOL, please read RFC 1036 before posting again. -- Anja Ivanov "When every node is whole, the channel opens." Pentium 90 (OS/2 Warp) / Linux 1.2.13