From aito@uni-hamburg.de Mon Jul 10 06:31:11 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!uni-hamburg!aito From: aito@uni-hamburg.de (Astrid Ito) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jul10.063111.8176@uni-hamburg.de> Date: Mon, 10 Jul 1995 06:31:11 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Astrid Ito | aito@uni-hamburg.de PGP Key fingerprint: 266D F8AA 37E8 7EFE "Keep the channels open." From bchoi@cmu.edu Wed Jul 12 01:41:11 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!cmu!bchoi From: bchoi@cmu.edu (Bruno Choi) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Jul12.014111.9427@cmu.edu> Date: Wed, 12 Jul 1995 01:41:11 GMT References: <1995Jul10.063111.8176@uni-hamburg.de> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Jul10.063111.8176@uni-hamburg.de>, aito@uni-hamburg.de (Astrid Ito) writes: > Technical analysis of the sub-audible carrier: data and MATLAB code below. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Bruno Choi Zyxel U-1496E @ 33,600 bps "Marcus is not one man."