From kweber@berkeley.edu Mon Jan 15 19:36:11 1996 Path: ashpoly!cascade!brgate!saturno!berkeley!kweber From: kweber@berkeley.edu (Karen Weber) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Jan15.193611.5394@berkeley.edu> Date: Mon, 15 Jan 1996 19:36:11 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N 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. Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. Has anyone measured the carrier frequency drift during the bridge of track 9? -- Karen Weber "The carrier frequency does not drift by accident." Acorn RiscPC 600 / FreeBSD 2.1 From leriksson@pipeline.com Tue Jan 16 07:10:11 1996 Path: ashpoly!cascade!mxgate!coyoacan!pipeline!leriksson From: leriksson@pipeline.com (Liam Eriksson) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Jan16.071011.1775@pipeline.com> Date: Tue, 16 Jan 1996 07:10:11 GMT References: <1996Jan15.193611.5394@berkeley.edu> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jan15.193611.5394@berkeley.edu>, kweber@berkeley.edu (Karen Weber) 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! -- Liam Eriksson Zyxel U-1496E @ ISDN 64k bps "The carrier frequency does not drift by accident." From rnakamura@mit.edu Thu Jan 18 04:25:11 1996 Path: ashpoly!cascade!bigsur!mit!rnakamura From: rnakamura@mit.edu (Renata Nakamura) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Jan18.042511.9973@mit.edu> Date: Thu, 18 Jan 1996 04:25:11 GMT References: <1996Jan15.193611.5394@berkeley.edu> <1996Jan16.071011.1775@pipeline.com> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jan16.071011.1775@pipeline.com>, leriksson@pipeline.com (Liam Eriksson) writes: > The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Renata Nakamura US Robotics Courier V.34 @ ISDN 64k bps "Hardware is temporary. The signal survives." From eoliveira@kiae.su Sat Jan 20 03:51:11 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!kiae!eoliveira From: eoliveira@kiae.su (Emi Oliveira) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Jan20.035111.3198@kiae.su> Date: Sat, 20 Jan 1996 03:51:11 GMT References: <1996Jan15.193611.5394@berkeley.edu> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Jan15.193611.5394@berkeley.edu>, kweber@berkeley.edu (Karen Weber) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. You're overlooking tape wow and flutter. A Revox B77 has at least 0.05% speed drift, which would smear a 14 Hz line across several bins. -- === Emi Oliveira === Dept of Electrical Engineering, Kurchatov Institute of Atomic Energy, Moscow "Do not worship the copy."