From fivanov@netcom.com Thu Feb 17 23:16:09 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!netcom!fivanov From: fivanov@netcom.com (Fiona Ivanov) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Feb17.231609.2498@netcom.com> Date: Thu, 17 Feb 1994 23:16:09 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 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. Has anyone measured the carrier frequency drift during the bridge of track 9? -- Fiona Ivanov Tape trading list upon request. SASE required for international mail. From erodriguez@rwth-aachen.de Fri Feb 18 06:02:09 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!rwth-aachen!erodriguez From: erodriguez@rwth-aachen.de (Elaine Rodríguez) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Feb18.060209.9558@rwth-aachen.de> Date: Fri, 18 Feb 1994 06:02:09 GMT References: <1994Feb17.231609.2498@netcom.com> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Feb17.231609.2498@netcom.com>, fivanov@netcom.com (Fiona Ivanov) writes: > 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. If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. -- Elaine Rodríguez -- RWTH Aachen Informatik "In theory there is no difference between theory and practice." From tmartinez@illinois.edu Fri Feb 18 19:19:09 1994 Path: ashpoly!cascade!brgate!saturno!illinois!tmartinez From: tmartinez@illinois.edu (Tyler Martínez) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Feb18.191909.4849@illinois.edu> Date: Fri, 18 Feb 1994 19:19:09 GMT References: <1994Feb17.231609.2498@netcom.com> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Feb17.231609.2498@netcom.com>, fivanov@netcom.com (Fiona Ivanov) writes: > 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. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Tyler Martínez SupraFAXModem 28.8 @ 28,800 bps "There are 14 nodes and only 10 countries. Count again." From vvasiliev@demon.co.uk Sun Feb 20 10:04:09 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!demon!vvasiliev From: vvasiliev@demon.co.uk (Valeria Vasiliev) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Feb20.100409.6585@demon.co.uk> Date: Sun, 20 Feb 1994 10:04:09 GMT References: <1994Feb17.231609.2498@netcom.com> <1994Feb18.191909.4849@illinois.edu> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Feb18.191909.4849@illinois.edu>, tmartinez@illinois.edu (Tyler Martínez) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Valeria Vasiliev | vvasiliev@demon.co.uk PGP Key fingerprint: 42EA A4DC C73E B13C "Keep the channels open." From gwatanabe@berkeley.edu Tue Feb 22 10:11:09 1994 Path: ashpoly!cascade!brgate!saturno!berkeley!gwatanabe From: gwatanabe@berkeley.edu (Graham Watanabe) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Feb22.101109.1405@berkeley.edu> Date: Tue, 22 Feb 1994 10:11:09 GMT References: <1994Feb17.231609.2498@netcom.com> <1994Feb18.191909.4849@illinois.edu> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Feb18.191909.4849@illinois.edu>, tmartinez@illinois.edu (Tyler Martínez) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. 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. -- Graham Watanabe Opinions expressed are solely my own and not those of UC Berkeley Department of EECS. ------------------------------------------------------------