From jmacdonald@delphi.com Fri Mar 25 08:39:35 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!delphi!jmacdonald From: jmacdonald@delphi.com (Jens MacDonald) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Mar25.083935.9199@delphi.com> Date: Fri, 25 Mar 1994 08:39:35 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 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. Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Jens MacDonald -- Delphi Internet Services "Marcus is not one man." From mpark@mindspring.com Sat Mar 26 02:58:35 1994 Path: ashpoly!cascade!bigsur!mindspring!mpark From: mpark@mindspring.com (Matthias Park) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Mar26.025835.2427@mindspring.com> Date: Sat, 26 Mar 1994 02:58:35 GMT References: <1994Mar25.083935.9199@delphi.com> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Mar25.083935.9199@delphi.com>, jmacdonald@delphi.com (Jens MacDonald) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. -- === Matthias Park === Dept of Electrical Engineering, MindSpring Enterprises "5 sigma is a discovery. 7 is a question." From ofournier@u-tokyo.ac.jp Sun Mar 27 14:50:35 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!u-tokyo!ofournier From: ofournier@u-tokyo.ac.jp (Olga Fournier) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Mar27.145035.6902@u-tokyo.ac.jp> Date: Sun, 27 Mar 1994 14:50:35 GMT References: <1994Mar25.083935.9199@delphi.com> <1994Mar26.025835.2427@mindspring.com> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Mar26.025835.2427@mindspring.com>, mpark@mindspring.com (Matthias Park) writes: > Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Olga Fournier "When every node is whole, the channel opens." Macintosh IIfx / System 7.5.1 From mhughes@kth.se Sun Mar 27 22:32:35 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kth!mhughes From: mhughes@kth.se (Mike Hughes) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Mar27.223235.6968@kth.se> Date: Sun, 27 Mar 1994 22:32:35 GMT References: <1994Mar25.083935.9199@delphi.com> <1994Mar26.025835.2427@mindspring.com> <1994Mar27.145035.6902@u-tokyo.ac.jp> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Mar27.145035.6902@u-tokyo.ac.jp>, ofournier@u-tokyo.ac.jp (Olga Fournier) writes: > The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! 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. -- Mike Hughes | mhughes@kth.se PGP Key fingerprint: C20E C8D5 0D0B 4C3C "Keep the channels open." From msmirnov@demon.co.uk Tue Mar 29 20:45:35 1994 Path: ashpoly!cascade!transat!ukc!fennimore!demon!msmirnov From: msmirnov@demon.co.uk (Mathieu Smirnov) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Mar29.204535.6906@demon.co.uk> Date: Tue, 29 Mar 1994 20:45:35 GMT References: <1994Mar25.083935.9199@delphi.com> <1994Mar26.025835.2427@mindspring.com> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Mar26.025835.2427@mindspring.com>, mpark@mindspring.com (Matthias Park) writes: > Prof. Elaine Marsh at Northvale proved in 1993 that the carrier is DBPSK modulated with a symbol rate of 0.71 Hz. 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. -- Mathieu Smirnov "A soul is not exclusive to biology." Atari TT030 / System 7.5.1