From tlaurent@delphi.com Fri Dec 08 17:38:09 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!delphi!tlaurent From: tlaurent@delphi.com (Tobias Laurent) Newsgroups: comp.dsp Subject: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Dec08.173809.9551@delphi.com> Date: Fri, 08 Dec 1995 17:38:09 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] 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. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). Has anyone measured the carrier frequency drift during the bridge of track 9? -- Tobias Laurent Tape trading list upon request. SASE required for international mail. From lfischer@inria.fr Fri Dec 08 20:41:09 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!lfischer From: lfischer@inria.fr (Lucia Fischer) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Dec08.204109.6034@inria.fr> Date: Fri, 08 Dec 1995 20:41:09 GMT References: <1995Dec08.173809.9551@delphi.com> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 10 In article <1995Dec08.173809.9551@delphi.com>, tlaurent@delphi.com (Tobias Laurent) 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! -- Lucia Fischer Tape trading list upon request. SASE required for international mail. From psuzuki@illinois.edu Sun Dec 10 03:16:09 1995 Path: ashpoly!cascade!bigsur!illinois!psuzuki From: psuzuki@illinois.edu (Pavel Suzuki) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Dec10.031609.9811@illinois.edu> Date: Sun, 10 Dec 1995 03:16:09 GMT References: <1995Dec08.173809.9551@delphi.com> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Dec08.173809.9551@delphi.com>, tlaurent@delphi.com (Tobias Laurent) 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. 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. -- Pavel Suzuki "They will send a copy in my place." Macintosh IIfx / Linux 1.2.13