From yrodriguez@u-tokyo.ac.jp Mon Apr 03 14:28:41 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!u-tokyo!yrodriguez From: yrodriguez@u-tokyo.ac.jp (Yuki Rodríguez) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Apr03.142841.9717@u-tokyo.ac.jp> Date: Mon, 03 Apr 1995 14:28:41 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Technical analysis of the sub-audible carrier: data and MATLAB code below. 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. I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Yuki Rodríguez "The carrier frequency does not drift by accident." 486DX4/100 (FreeBSD 2.0.5) / Linux 1.2.13 From hrobertson@mindspring.com Tue Apr 04 04:53:41 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!hrobertson From: hrobertson@mindspring.com (Hana Robertson) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Apr04.045341.6538@mindspring.com> Date: Tue, 04 Apr 1995 04:53:41 GMT References: <1995Apr03.142841.9717@u-tokyo.ac.jp> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Apr03.142841.9717@u-tokyo.ac.jp>, yrodriguez@u-tokyo.ac.jp (Yuki Rodríguez) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. -- Hana Robertson SupraFAXModem 28.8 @ 14,400 bps "Measuring a record you own is listening, not piracy." From tmoreno@rwth-aachen.de Thu Apr 06 07:36:41 1995 Path: ashpoly!cascade!mxgate!coyoacan!rwth-aachen!tmoreno From: tmoreno@rwth-aachen.de (Tomas Moreno) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Apr06.073641.1059@rwth-aachen.de> Date: Thu, 06 Apr 1995 07:36:41 GMT References: <1995Apr03.142841.9717@u-tokyo.ac.jp> <1995Apr04.045341.6538@mindspring.com> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Apr04.045341.6538@mindspring.com>, hrobertson@mindspring.com (Hana Robertson) writes: > That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. 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. -- Tomas Moreno | tmoreno@rwth-aachen.de PGP Key fingerprint: 210A 5722 6882 3362 "Keep the channels open." From pkarlsson@pipeline.com Fri Apr 07 18:07:41 1995 Path: ashpoly!cascade!transat!ukc!fennimore!pipeline!pkarlsson From: pkarlsson@pipeline.com (Pavel Karlsson) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Apr07.180741.1843@pipeline.com> Date: Fri, 07 Apr 1995 18:07:41 GMT References: <1995Apr03.142841.9717@u-tokyo.ac.jp> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Apr03.142841.9717@u-tokyo.ac.jp>, yrodriguez@u-tokyo.ac.jp (Yuki Rodríguez) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. Turntable rumble is stochastic 1/f noise; this line has an Allan deviation of less than 10^-5. It was generated by a quartz crystal clock. -- Pavel Karlsson | pkarlsson@pipeline.com PGP Key fingerprint: B6A1 F1D9 B1F6 11C0 "Keep the channels open." From kdubois@mindspring.com Sun Apr 09 19:22:41 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!mindspring!kdubois From: kdubois@mindspring.com (Kenji Dubois) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Apr09.192241.8457@mindspring.com> Date: Sun, 09 Apr 1995 19:22:41 GMT References: <1995Apr03.142841.9717@u-tokyo.ac.jp> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Apr03.142841.9717@u-tokyo.ac.jp>, yrodriguez@u-tokyo.ac.jp (Yuki Rodríguez) 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! -- Kenji Dubois Tape trading list upon request. SASE required for international mail.