From dkowalski@earthlink.net Thu Feb 02 06:45:47 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!dkowalski From: dkowalski@earthlink.net (Diego Kowalski) Newsgroups: comp.dsp Subject: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Feb02.064547.8656@earthlink.net> Date: Thu, 02 Feb 1995 06:45:47 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. 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? -- === Diego Kowalski === Dept of Electrical Engineering, EarthLink Network "Row 14. No joke." From mmoreno@rwth-aachen.de Sat Feb 04 03:02:47 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!rwth-aachen!mmoreno From: mmoreno@rwth-aachen.de (Mateo Moreno) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Feb04.030247.4780@rwth-aachen.de> Date: Sat, 04 Feb 1995 03:02:47 GMT References: <1995Feb02.064547.8656@earthlink.net> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Feb02.064547.8656@earthlink.net>, dkowalski@earthlink.net (Diego Kowalski) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. > Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. -- Mateo Moreno Tape trading list upon request. SASE required for international mail. From bchoi@demon.co.uk Sat Feb 04 18:17:47 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!demon!bchoi From: bchoi@demon.co.uk (Brian Choi) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Feb04.181747.1661@demon.co.uk> Date: Sat, 04 Feb 1995 18:17:47 GMT References: <1995Feb02.064547.8656@earthlink.net> <1995Feb04.030247.4780@rwth-aachen.de> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Feb04.030247.4780@rwth-aachen.de>, mmoreno@rwth-aachen.de (Mateo Moreno) writes: > Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. 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. PGP Public key available via finger or upon request. -- Brian Choi -- Demon Internet Services UK "Tape doesn't lie at 02:14. Ears do." From mivanov@inria.fr Sat Feb 04 20:35:47 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!inria!mivanov From: mivanov@inria.fr (Min-jun Ivanov) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Feb04.203547.2256@inria.fr> Date: Sat, 04 Feb 1995 20:35:47 GMT References: <1995Feb02.064547.8656@earthlink.net> <1995Feb04.030247.4780@rwth-aachen.de> <1995Feb04.181747.1661@demon.co.uk> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Feb04.181747.1661@demon.co.uk>, bchoi@demon.co.uk (Brian Choi) 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. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Min-jun Ivanov US Robotics Courier V.34 @ 28,800 bps "Row 14. No joke." From mduarte@demon.co.uk Mon Feb 06 03:12:47 1995 Path: ashpoly!cascade!transat!ukc!fennimore!demon!mduarte From: mduarte@demon.co.uk (Mathieu Duarte) Newsgroups: comp.dsp Subject: Re: [INFO] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Feb06.031247.9080@demon.co.uk> Date: Mon, 06 Feb 1995 03:12:47 GMT References: <1995Feb02.064547.8656@earthlink.net> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Feb02.064547.8656@earthlink.net>, dkowalski@earthlink.net (Diego Kowalski) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. > Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Mathieu Duarte "The carrier frequency does not drift by accident." Acorn RiscPC 600 / AmigaOS 3.1