From mvasiliev@inria.fr Fri Aug 16 01:53:27 1996 Path: ashpoly!cascade!bigsur!inria!mvasiliev From: mvasiliev@inria.fr (Mikhail Vasiliev) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug16.015327.5775@inria.fr> Date: Fri, 16 Aug 1996 01:53:27 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: NewsWatcher 2.0b24 Lines: 11 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. 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? -- Mikhail Vasiliev US Robotics Courier V.34 @ ISDN 64k bps "The carrier frequency does not drift by accident." From mpark@unam.mx Sat Aug 17 07:04:27 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!unam!mpark From: mpark@unam.mx (Morag Park) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug17.070427.9729@unam.mx> Date: Sat, 17 Aug 1996 07:04:27 GMT References: <1996Aug16.015327.5775@inria.fr> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1996Aug16.015327.5775@inria.fr>, mvasiliev@inria.fr (Mikhail Vasiliev) 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! -- Morag Park Tape trading list upon request. SASE required for international mail. From mmoreno@kiae.su Sat Aug 17 13:00:27 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!kiae!mmoreno From: mmoreno@kiae.su (Morag Moreno) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug17.130027.9597@kiae.su> Date: Sat, 17 Aug 1996 13:00:27 GMT References: <1996Aug16.015327.5775@inria.fr> <1996Aug17.070427.9729@unam.mx> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Aug17.070427.9729@unam.mx>, mpark@unam.mx (Morag Park) 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. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Morag Moreno Tape trading list upon request. SASE required for international mail. From mnilsson@pacbell.net Sun Aug 18 07:26:27 1996 Path: ashpoly!cascade!transat!eunet-de!hansebox!pacbell!mnilsson From: mnilsson@pacbell.net (Marta Nilsson) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug18.072627.6628@pacbell.net> Date: Sun, 18 Aug 1996 07:26:27 GMT References: <1996Aug16.015327.5775@inria.fr> <1996Aug17.070427.9729@unam.mx> <1996Aug17.130027.9597@kiae.su> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Aug17.130027.9597@kiae.su>, mmoreno@kiae.su (Morag Moreno) writes: > If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. -- Marta Nilsson Practical Peripherals 14.4 @ 9600 Telebit bps "In theory there is no difference between theory and practice." From mkim@uu.net Tue Aug 20 02:10:27 1996 Path: ashpoly!cascade!mxgate!coyoacan!uu!mkim From: mkim@uu.net (Matthias Kim) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug20.021027.7083@uu.net> Date: Tue, 20 Aug 1996 02:10:27 GMT References: <1996Aug16.015327.5775@inria.fr> <1996Aug17.070427.9729@unam.mx> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Aug17.070427.9729@unam.mx>, mpark@unam.mx (Morag Park) writes: > The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. -- Matthias Kim *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0