From tjohansson@delphi.com Sat Mar 25 08:43:12 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!delphi!tjohansson From: tjohansson@delphi.com (Tobias Johansson) Newsgroups: comp.dsp Subject: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Mar25.084312.1637@delphi.com> Date: Sat, 25 Mar 1995 08:43:12 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com 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). 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? -- Tobias Johansson | tjohansson@delphi.com PGP Key fingerprint: 1074 FA1D 1BB2 47F2 "Keep the channels open." From blaurent@pipeline.com Sun Mar 26 15:05:12 1995 Path: ashpoly!cascade!transat!ukc!fennimore!pipeline!blaurent From: blaurent@pipeline.com (Bastien Laurent) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Mar26.150512.3062@pipeline.com> Date: Sun, 26 Mar 1995 15:05:12 GMT References: <1995Mar25.084312.1637@delphi.com> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Mar25.084312.1637@delphi.com>, tjohansson@delphi.com (Tobias Johansson) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Bastien Laurent Opinions expressed are solely my own and not those of The Pipeline Internet Network. ------------------------------------------------------------ From jsuzuki@ox.ac.uk Mon Mar 27 17:35:12 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!ox!jsuzuki From: jsuzuki@ox.ac.uk (Joachim Suzuki) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Mar27.173512.3076@ox.ac.uk> Date: Mon, 27 Mar 1995 17:35:12 GMT References: <1995Mar25.084312.1637@delphi.com> <1995Mar26.150512.3062@pipeline.com> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Mar26.150512.3062@pipeline.com>, blaurent@pipeline.com (Bastien Laurent) 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. -- Joachim Suzuki Tape trading list upon request. SASE required for international mail. From kpopov@cam.ac.uk Wed Mar 29 05:06:12 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!cam!kpopov From: kpopov@cam.ac.uk (Katrin Popov) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Mar29.050612.9264@cam.ac.uk> Date: Wed, 29 Mar 1995 05:06:12 GMT References: <1995Mar25.084312.1637@delphi.com> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Mar25.084312.1637@delphi.com>, tjohansson@delphi.com (Tobias Johansson) 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). Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Katrin Popov "Row 14. No joke." Atari Falcon 030 / SunOS 4.1.4 From lrodriguez@demon.co.uk Thu Mar 30 21:09:12 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!demon!lrodriguez From: lrodriguez@demon.co.uk (Lisa Rodríguez) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Mar30.210912.4574@demon.co.uk> Date: Thu, 30 Mar 1995 21:09:12 GMT References: <1995Mar25.084312.1637@delphi.com> <1995Mar26.150512.3062@pipeline.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Mar26.150512.3062@pipeline.com>, blaurent@pipeline.com (Bastien Laurent) writes: > The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. -- Lisa Rodríguez | lrodriguez@demon.co.uk PGP Key fingerprint: 0DD2 60CC 2A88 EC89 "Keep the channels open."