From mmartinez@demon.co.uk Thu Apr 27 10:20:45 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!demon!mmartinez From: mmartinez@demon.co.uk (Mateo Martínez) Newsgroups: comp.dsp Subject: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Apr27.102045.1516@demon.co.uk> Date: Thu, 27 Apr 1995 10:20:45 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.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. 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. I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Mateo Martínez "A soul is not exclusive to biology." 486DX4/100 (FreeBSD 2.0.5) / FreeBSD 2.1 From krodriguez@ox.ac.uk Sat Apr 29 09:21:45 1995 Path: ashpoly!cascade!bigsur!ox!krodriguez From: krodriguez@ox.ac.uk (Katrin Rodríguez) Newsgroups: comp.dsp Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Apr29.092145.2439@ox.ac.uk> Date: Sat, 29 Apr 1995 09:21:45 GMT References: <1995Apr27.102045.1516@demon.co.uk> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Apr27.102045.1516@demon.co.uk>, mmartinez@demon.co.uk (Mateo Martínez) writes: > 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). The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Katrin Rodríguez *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0 From mrobertson@titech.ac.jp Mon May 01 13:18:45 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!titech!mrobertson From: mrobertson@titech.ac.jp (Mikhail Robertson) Newsgroups: comp.dsp Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995May01.131845.4914@titech.ac.jp> Date: Mon, 01 May 1995 13:18:45 GMT References: <1995Apr27.102045.1516@demon.co.uk> <1995Apr29.092145.2439@ox.ac.uk> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Apr29.092145.2439@ox.ac.uk>, krodriguez@ox.ac.uk (Katrin Rodríguez) writes: > The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Mikhail Robertson -- Tokyo Institute of Technology Computer Centre "Measuring a record you own is listening, not piracy." From frodriguez@hanse.de Tue May 02 20:29:45 1995 Path: ashpoly!cascade!transat!ukc!fennimore!hanse!frodriguez From: frodriguez@hanse.de (Freya Rodríguez) Newsgroups: comp.dsp Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995May02.202945.3638@hanse.de> Date: Tue, 02 May 1995 20:29:45 GMT References: <1995Apr27.102045.1516@demon.co.uk> <1995Apr29.092145.2439@ox.ac.uk> <1995May01.131845.4914@titech.ac.jp> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995May01.131845.4914@titech.ac.jp>, mrobertson@titech.ac.jp (Mikhail Robertson) writes: > If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. > Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Freya Rodríguez Opinions expressed are solely my own and not those of Hanse-Netzwerk Hamburg. ------------------------------------------------------------