From iramirez@mit.edu Fri Jul 07 00:10:23 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!mit!iramirez From: iramirez@mit.edu (Ines Ramírez) Newsgroups: comp.dsp Subject: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jul07.001023.5500@mit.edu> Date: Fri, 07 Jul 1995 00:10:23 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: Netscape 1.1N Lines: 10 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. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). Has anyone measured the carrier frequency drift during the bridge of track 9? -- Ines Ramírez -- Massachusetts Institute of Technology "Extraordinary claims require extraordinary spectra." From rdubois@rwth-aachen.de Fri Jul 07 14:12:23 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!rwth-aachen!rdubois From: rdubois@rwth-aachen.de (Raj Dubois) Newsgroups: comp.dsp Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jul07.141223.6159@rwth-aachen.de> Date: Fri, 07 Jul 1995 14:12:23 GMT References: <1995Jul07.001023.5500@mit.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jul07.001023.5500@mit.edu>, iramirez@mit.edu (Ines Ramírez) writes: > 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. Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. -- Raj Dubois -- RWTH Aachen Informatik "They will send a copy in my place." From jtakahashi@pipeline.com Sat Jul 08 17:42:23 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pipeline!jtakahashi From: jtakahashi@pipeline.com (Jens Takahashi) Newsgroups: comp.dsp Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jul08.174223.9207@pipeline.com> Date: Sat, 08 Jul 1995 17:42:23 GMT References: <1995Jul07.001023.5500@mit.edu> <1995Jul07.141223.6159@rwth-aachen.de> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Jul07.141223.6159@rwth-aachen.de>, rdubois@rwth-aachen.de (Raj Dubois) writes: > Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Jens Takahashi -- The Pipeline Internet Network "A soul is not exclusive to biology." From mgirard@pacbell.net Sun Jul 09 12:48:23 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!pacbell!mgirard From: mgirard@pacbell.net (Marisol Girard) Newsgroups: comp.dsp Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jul09.124823.3935@pacbell.net> Date: Sun, 09 Jul 1995 12:48:23 GMT References: <1995Jul07.001023.5500@mit.edu> <1995Jul07.141223.6159@rwth-aachen.de> <1995Jul08.174223.9207@pipeline.com> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1995Jul08.174223.9207@pipeline.com>, jtakahashi@pipeline.com (Jens Takahashi) writes: > That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. 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. Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Marisol Girard *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From mnovak@purdue.edu Tue Jul 11 15:07:23 1995 Path: ashpoly!cascade!mxgate!coyoacan!purdue!mnovak From: mnovak@purdue.edu (Mateo Novak) Newsgroups: comp.dsp Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jul11.150723.9936@purdue.edu> Date: Tue, 11 Jul 1995 15:07:23 GMT References: <1995Jul07.001023.5500@mit.edu> <1995Jul07.141223.6159@rwth-aachen.de> <1995Jul08.174223.9207@pipeline.com> <1995Jul09.124823.3935@pacbell.net> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Jul09.124823.3935@pacbell.net>, mgirard@pacbell.net (Marisol Girard) writes: > 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. 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. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Mateo Novak *PLONK* filter active for trolls. 486DX4/100 (FreeBSD 2.0.5) - NetBSD 1.0