From tchoi@clari.net Sun Aug 06 11:41:46 1995 Path: ashpoly!cascade!bigsur!clari!tchoi From: tchoi@clari.net (Takeshi Choi) Newsgroups: comp.dsp Subject: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Aug06.114146.5171@clari.net> Date: Sun, 06 Aug 1995 11:41:46 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 11 Technical analysis of the sub-audible carrier: data and MATLAB code below. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). 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? -- Takeshi Choi *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From jrodriguez@unam.mx Sun Aug 06 17:09:46 1995 Path: ashpoly!cascade!bigsur!unam!jrodriguez From: jrodriguez@unam.mx (Julien Rodríguez) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Aug06.170946.1954@unam.mx> Date: Sun, 06 Aug 1995 17:09:46 GMT References: <1995Aug06.114146.5171@clari.net> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Aug06.114146.5171@clari.net>, tchoi@clari.net (Takeshi Choi) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. > With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Julien Rodríguez -- Universidad Nacional Autónoma de México (DGSCA) "5 sigma is a discovery. 7 is a question."