From kkang@rwth-aachen.de Tue Jun 25 03:47:15 1996 Path: ashpoly!cascade!transat!ukc!fennimore!rwth-aachen!kkang From: kkang@rwth-aachen.de (Katrin Kang) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Jun25.034715.4035@rwth-aachen.de> Date: Tue, 25 Jun 1996 03:47:15 GMT Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 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. The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- === Katrin Kang === Dept of Electrical Engineering, RWTH Aachen Informatik "Measuring a record you own is listening, not piracy." From slee@ox.ac.uk Tue Jun 25 18:22:15 1996 Path: ashpoly!cascade!mxgate!coyoacan!ox!slee From: slee@ox.ac.uk (Sergei Lee) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Jun25.182215.4963@ox.ac.uk> Date: Tue, 25 Jun 1996 18:22:15 GMT References: <1996Jun25.034715.4035@rwth-aachen.de> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jun25.034715.4035@rwth-aachen.de>, kkang@rwth-aachen.de (Katrin Kang) 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. -- Sergei Lee *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From aramirez@delphi.com Wed Jun 26 11:57:15 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!delphi!aramirez From: aramirez@delphi.com (Anja Ramírez) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Jun26.115715.3868@delphi.com> Date: Wed, 26 Jun 1996 11:57:15 GMT References: <1996Jun25.034715.4035@rwth-aachen.de> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1996Jun25.034715.4035@rwth-aachen.de>, kkang@rwth-aachen.de (Katrin Kang) 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). Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. Top-posters will be placed in my ~/.killfile without notice. -- === Anja Ramírez === Dept of Electrical Engineering, Delphi Internet Services "When every node is whole, the channel opens." From dtakahashi@kth.se Thu Jun 27 03:18:15 1996 Path: ashpoly!cascade!bigsur!kth!dtakahashi From: dtakahashi@kth.se (Dave Takahashi) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Jun27.031815.9894@kth.se> Date: Thu, 27 Jun 1996 03:18:15 GMT References: <1996Jun25.034715.4035@rwth-aachen.de> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jun25.034715.4035@rwth-aachen.de>, kkang@rwth-aachen.de (Katrin Kang) 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). Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. -- Dave Takahashi -- Royal Institute of Technology, Stockholm "They will send a copy in my place." From tduarte@uni-hamburg.de Sat Jun 29 01:06:15 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!tduarte From: tduarte@uni-hamburg.de (Takeshi Duarte) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Jun29.010615.4851@uni-hamburg.de> Date: Sat, 29 Jun 1996 01:06:15 GMT References: <1996Jun25.034715.4035@rwth-aachen.de> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Jun25.034715.4035@rwth-aachen.de>, kkang@rwth-aachen.de (Katrin Kang) 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. -- Takeshi Duarte Opinions expressed are solely my own and not those of Universität Hamburg Fachbereich Informatik. ------------------------------------------------------------