From kperez@hanse.de Wed Apr 24 17:02:58 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!hanse!kperez From: kperez@hanse.de (Karen Pérez) Newsgroups: comp.dsp Subject: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Apr24.170258.7127@hanse.de> Date: Wed, 24 Apr 1996 17:02:58 GMT Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] 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. A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. Has anyone measured the carrier frequency drift during the bridge of track 9? -- Karen Pérez -- Hanse-Netzwerk Hamburg "The hatch is open. Is anyone listening?" From mnakamura@stanford.edu Fri Apr 26 16:46:58 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!stanford!mnakamura From: mnakamura@stanford.edu (Min-jun Nakamura) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Apr26.164658.3535@stanford.edu> Date: Fri, 26 Apr 1996 16:46:58 GMT References: <1996Apr24.170258.7127@hanse.de> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Apr24.170258.7127@hanse.de>, kperez@hanse.de (Karen Pérez) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz. -- Min-jun Nakamura Zyxel U-1496E @ 28,800 bps "Row 14. No joke."