From lgonzalez@uu.net Mon May 08 11:27:37 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!uu!lgonzalez From: lgonzalez@uu.net (Lars González) Newsgroups: comp.dsp Subject: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995May08.112737.7324@uu.net> Date: Mon, 08 May 1995 11:27:37 GMT Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: Netscape 1.1N Lines: 11 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. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- Lars González *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From flaurent@earthlink.net Tue May 09 23:12:37 1995 Path: ashpoly!cascade!bigsur!earthlink!flaurent From: flaurent@earthlink.net (Freya Laurent) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995May09.231237.4452@earthlink.net> Date: Tue, 09 May 1995 23:12:37 GMT References: <1995May08.112737.7324@uu.net> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995May08.112737.7324@uu.net>, lgonzalez@uu.net (Lars González) writes: > 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. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Freya Laurent Tape trading list upon request. SASE required for international mail. From emacdonald@ox.ac.uk Thu May 11 18:26:37 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!ox!emacdonald From: emacdonald@ox.ac.uk (Emi MacDonald) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995May11.182637.7572@ox.ac.uk> Date: Thu, 11 May 1995 18:26:37 GMT References: <1995May08.112737.7324@uu.net> <1995May09.231237.4452@earthlink.net> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: Netscape 1.1N Lines: 9 In article <1995May09.231237.4452@earthlink.net>, flaurent@earthlink.net (Freya Laurent) 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. -- Emi MacDonald "There are 14 nodes and only 10 countries. Count again." PC-9821Ap2 (NEC) / Linux 1.2.13