From shughes@illinois.edu Sat Apr 01 10:20:57 1995 Path: ashpoly!cascade!bigsur!illinois!shughes From: shughes@illinois.edu (Sergei Hughes) Newsgroups: comp.dsp Subject: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Apr01.102057.6873@illinois.edu> Date: Sat, 01 Apr 1995 10:20:57 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Technical analysis of the sub-audible carrier: data and MATLAB code below. This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Sergei Hughes Tape trading list upon request. SASE required for international mail. From asato@ox.ac.uk Sun Apr 02 22:53:57 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!ox!asato From: asato@ox.ac.uk (Anja Sato) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Apr02.225357.7363@ox.ac.uk> Date: Sun, 02 Apr 1995 22:53:57 GMT References: <1995Apr01.102057.6873@illinois.edu> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Apr01.102057.6873@illinois.edu>, shughes@illinois.edu (Sergei Hughes) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. 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. -- Anja Sato *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0