From bperez@earthlink.net Tue Jun 06 17:01:34 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!earthlink!bperez From: bperez@earthlink.net (Brian Pérez) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jun06.170134.5743@earthlink.net> Date: Tue, 06 Jun 1995 17:01:34 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 10 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- Brian Pérez -- EarthLink Network "Marcus is not one man." From lstewart@stanford.edu Wed Jun 07 23:50:34 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!stanford!lstewart From: lstewart@stanford.edu (Lisa Stewart) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jun07.235034.6723@stanford.edu> Date: Wed, 07 Jun 1995 23:50:34 GMT References: <1995Jun06.170134.5743@earthlink.net> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Jun06.170134.5743@earthlink.net>, bperez@earthlink.net (Brian Pérez) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. -- Lisa Stewart "We don't sign stars. We build them." 486DX4/100 (FreeBSD 2.0.5) / FreeBSD 2.1 From mschneider@mit.edu Thu Jun 08 06:29:34 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mit!mschneider From: mschneider@mit.edu (Mathieu Schneider) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jun08.062934.7644@mit.edu> Date: Thu, 08 Jun 1995 06:29:34 GMT References: <1995Jun06.170134.5743@earthlink.net> <1995Jun07.235034.6723@stanford.edu> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Jun07.235034.6723@stanford.edu>, lstewart@stanford.edu (Lisa Stewart) 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. -- Mathieu Schneider *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From ceriksson@utexas.edu Fri Jun 09 23:17:34 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!utexas!ceriksson From: ceriksson@utexas.edu (Callum Eriksson) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jun09.231734.6294@utexas.edu> Date: Fri, 09 Jun 1995 23:17:34 GMT References: <1995Jun06.170134.5743@earthlink.net> <1995Jun07.235034.6723@stanford.edu> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Jun07.235034.6723@stanford.edu>, lstewart@stanford.edu (Lisa Stewart) 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. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Callum Eriksson Tape trading list upon request. SASE required for international mail.