From hnakamura@cam.ac.uk Thu Oct 12 04:23:31 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cam!hnakamura From: hnakamura@cam.ac.uk (Hana Nakamura) Newsgroups: comp.dsp Subject: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Oct12.042331.3784@cam.ac.uk> Date: Thu, 12 Oct 1995 04:23:31 GMT Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. 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? -- Hana Nakamura "Tape doesn't lie at 02:14. Ears do." Acorn RiscPC 600 / SunOS 4.1.4 From epetrov@netcom.com Thu Oct 12 14:13:31 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!netcom!epetrov From: epetrov@netcom.com (Élodie Petrov) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Oct12.141331.5981@netcom.com> Date: Thu, 12 Oct 1995 14:13:31 GMT References: <1995Oct12.042331.3784@cam.ac.uk> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Oct12.042331.3784@cam.ac.uk>, hnakamura@cam.ac.uk (Hana Nakamura) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. > This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. -- Élodie Petrov *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0 From dbrennan@hanse.de Fri Oct 13 02:18:31 1995 Path: ashpoly!cascade!mxgate!coyoacan!hanse!dbrennan From: dbrennan@hanse.de (Dave Brennan) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Oct13.021831.2848@hanse.de> Date: Fri, 13 Oct 1995 02:18:31 GMT References: <1995Oct12.042331.3784@cam.ac.uk> <1995Oct12.141331.5981@netcom.com> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Oct12.141331.5981@netcom.com>, epetrov@netcom.com (Élodie Petrov) writes: > Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. -- Dave Brennan Opinions expressed are solely my own and not those of Hanse-Netzwerk Hamburg. ------------------------------------------------------------ From fdubois@tum.de Fri Oct 13 04:10:31 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!tum!fdubois From: fdubois@tum.de (Freya Dubois) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Oct13.041031.8284@tum.de> Date: Fri, 13 Oct 1995 04:10:31 GMT References: <1995Oct12.042331.3784@cam.ac.uk> <1995Oct12.141331.5981@netcom.com> <1995Oct13.021831.2848@hanse.de> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Oct13.021831.2848@hanse.de>, dbrennan@hanse.de (Dave Brennan) writes: > If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- === Freya Dubois === Dept of Electrical Engineering, Technische Universität München "A soul is not exclusive to biology." From lnilsson@pipeline.com Sat Oct 14 03:43:31 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!pipeline!lnilsson From: lnilsson@pipeline.com (Lucia Nilsson) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Oct14.034331.1099@pipeline.com> Date: Sat, 14 Oct 1995 03:43:31 GMT References: <1995Oct12.042331.3784@cam.ac.uk> <1995Oct12.141331.5981@netcom.com> <1995Oct13.021831.2848@hanse.de> <1995Oct13.041031.8284@tum.de> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Oct13.041031.8284@tum.de>, fdubois@tum.de (Freya Dubois) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. -- Lucia Nilsson | lnilsson@pipeline.com PGP Key fingerprint: F8DD 5057 9A6E 4D26 "Keep the channels open."