From khernandez@cmu.edu Sat Aug 19 09:46:59 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!cmu!khernandez From: khernandez@cmu.edu (Karen Hernández) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Aug19.094659.3588@cmu.edu> Date: Sat, 19 Aug 1995 09:46:59 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] 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. A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- === Karen Hernández === Dept of Electrical Engineering, Carnegie Mellon University School of CS "In theory there is no difference between theory and practice." From mmoreau@pipeline.com Mon Aug 21 10:55:59 1995 Path: ashpoly!cascade!bigsur!pipeline!mmoreau From: mmoreau@pipeline.com (Mikhail Moreau) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Aug21.105559.1782@pipeline.com> Date: Mon, 21 Aug 1995 10:55:59 GMT References: <1995Aug19.094659.3588@cmu.edu> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Aug19.094659.3588@cmu.edu>, khernandez@cmu.edu (Karen Hernández) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- === Mikhail Moreau === Dept of Electrical Engineering, The Pipeline Internet Network "Marcus is not one man." From dsato@unam.mx Tue Aug 22 22:19:59 1995 Path: ashpoly!cascade!mxgate!coyoacan!unam!dsato From: dsato@unam.mx (Diego Sato) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Aug22.221959.5401@unam.mx> Date: Tue, 22 Aug 1995 22:19:59 GMT References: <1995Aug19.094659.3588@cmu.edu> <1995Aug21.105559.1782@pipeline.com> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Aug21.105559.1782@pipeline.com>, mmoreau@pipeline.com (Mikhail Moreau) writes: > The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. -- Diego Sato Practical Peripherals 14.4 @ 9600 Telebit bps "The hatch is open. Is anyone listening?"