From slopez@cmu.edu Tue Aug 01 13:05:48 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cmu!slopez From: slopez@cmu.edu (Seo-yeon López) Newsgroups: comp.dsp Subject: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Aug01.130548.9671@cmu.edu> Date: Tue, 01 Aug 1995 13:05:48 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 11 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. 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. Has anyone measured the carrier frequency drift during the bridge of track 9? -- === Seo-yeon López === Dept of Electrical Engineering, Carnegie Mellon University School of CS "Tape doesn't lie at 02:14. Ears do." From cwatanabe@pipeline.com Tue Aug 01 19:43:48 1995 Path: ashpoly!cascade!brgate!saturno!pipeline!cwatanabe From: cwatanabe@pipeline.com (Camila Watanabe) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Aug01.194348.3167@pipeline.com> Date: Tue, 01 Aug 1995 19:43:48 GMT References: <1995Aug01.130548.9671@cmu.edu> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Aug01.130548.9671@cmu.edu>, slopez@cmu.edu (Seo-yeon López) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Camila Watanabe *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From snovak@mindspring.com Wed Aug 02 14:30:48 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!snovak From: snovak@mindspring.com (Seo-yeon Novak) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Aug02.143048.2604@mindspring.com> Date: Wed, 02 Aug 1995 14:30:48 GMT References: <1995Aug01.130548.9671@cmu.edu> <1995Aug01.194348.3167@pipeline.com> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Aug01.194348.3167@pipeline.com>, cwatanabe@pipeline.com (Camila Watanabe) 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. 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Seo-yeon Novak Opinions expressed are solely my own and not those of MindSpring Enterprises. ------------------------------------------------------------ From mlindqvist@hanse.de Fri Aug 04 14:13:48 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!hanse!mlindqvist From: mlindqvist@hanse.de (Matthias Lindqvist) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Aug04.141348.3675@hanse.de> Date: Fri, 04 Aug 1995 14:13:48 GMT References: <1995Aug01.130548.9671@cmu.edu> <1995Aug01.194348.3167@pipeline.com> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Aug01.194348.3167@pipeline.com>, cwatanabe@pipeline.com (Camila Watanabe) 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. > My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. -- Matthias Lindqvist "Row 14. No joke." NeXTstation Turbo Color / FreeBSD 2.1 From slindqvist@demon.co.uk Fri Aug 04 23:45:48 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!demon!slindqvist From: slindqvist@demon.co.uk (Sun-mi Lindqvist) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Aug04.234548.8334@demon.co.uk> Date: Fri, 04 Aug 1995 23:45:48 GMT References: <1995Aug01.130548.9671@cmu.edu> <1995Aug01.194348.3167@pipeline.com> <1995Aug04.141348.3675@hanse.de> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Aug04.141348.3675@hanse.de>, mlindqvist@hanse.de (Matthias Lindqvist) writes: > If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. -- Sun-mi Lindqvist Opinions expressed are solely my own and not those of Demon Internet Services UK. ------------------------------------------------------------