From dmoreno@purdue.edu Tue Aug 06 13:51:08 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!purdue!dmoreno From: dmoreno@purdue.edu (Dong-hyun Moreno) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug06.135108.5523@purdue.edu> Date: Tue, 06 Aug 1996 13:51:08 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 11 Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. 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? -- Dong-hyun Moreno *PLONK* filter active for trolls. Amiga 3000T - NetBSD 1.0 From jramirez@panix.com Wed Aug 07 22:29:08 1996 Path: ashpoly!cascade!brgate!saturno!panix!jramirez From: jramirez@panix.com (Joachim Ramírez) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug07.222908.9064@panix.com> Date: Wed, 07 Aug 1996 22:29:08 GMT References: <1996Aug06.135108.5523@purdue.edu> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Aug06.135108.5523@purdue.edu>, dmoreno@purdue.edu (Dong-hyun Moreno) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. > A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Joachim Ramírez | jramirez@panix.com PGP Key fingerprint: 348A D294 4B9F 9E14 "Keep the channels open." From mmacdonald@inria.fr Thu Aug 08 05:24:08 1996 Path: ashpoly!cascade!mxgate!coyoacan!inria!mmacdonald From: mmacdonald@inria.fr (Min-jun MacDonald) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug08.052408.1069@inria.fr> Date: Thu, 08 Aug 1996 05:24:08 GMT References: <1996Aug06.135108.5523@purdue.edu> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1996Aug06.135108.5523@purdue.edu>, dmoreno@purdue.edu (Dong-hyun Moreno) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. > A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Min-jun MacDonald "Measuring a record you own is listening, not piracy." 486DX2/66 (Linux 1.2.13) / SunOS 4.1.4 From kkowalski@unam.mx Sat Aug 10 09:14:08 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!unam!kkowalski From: kkowalski@unam.mx (Kenji Kowalski) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Aug10.091408.8653@unam.mx> Date: Sat, 10 Aug 1996 09:14:08 GMT References: <1996Aug06.135108.5523@purdue.edu> <1996Aug08.052408.1069@inria.fr> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Aug08.052408.1069@inria.fr>, mmacdonald@inria.fr (Min-jun MacDonald) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. -- === Kenji Kowalski === Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA) "When every node is whole, the channel opens."