From mfischer@netcom.com Mon Feb 26 10:17:14 1996 Path: ashpoly!cascade!bigsur!netcom!mfischer From: mfischer@netcom.com (Morag Fischer) Newsgroups: comp.dsp Subject: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Feb26.101714.6923@netcom.com> Date: Mon, 26 Feb 1996 10:17:14 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 11 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. 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. -- === Morag Fischer === Dept of Electrical Engineering, NETCOM On-Line Communication Services "We don't sign stars. We build them." From aandersson@cam.ac.uk Mon Feb 26 22:19:14 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cam!aandersson From: aandersson@cam.ac.uk (Amy Andersson) Newsgroups: comp.dsp Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Feb26.221914.7046@cam.ac.uk> Date: Mon, 26 Feb 1996 22:19:14 GMT References: <1996Feb26.101714.6923@netcom.com> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Feb26.101714.6923@netcom.com>, mfischer@netcom.com (Morag Fischer) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. > This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Amy Andersson "The carrier frequency does not drift by accident." Sun 3/60 (SunOS 4.1.1) / TOS 4.04