From jcampbell@mit.edu Thu May 16 03:50:28 1996 Path: ashpoly!cascade!transat!sunet!nordrelay!mit!jcampbell From: jcampbell@mit.edu (Jens Campbell) Newsgroups: comp.dsp Subject: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996May16.035028.7975@mit.edu> Date: Thu, 16 May 1996 03:50:28 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 10 Technical analysis of the sub-audible carrier: data and MATLAB code below. Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale. This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. Has anyone measured the carrier frequency drift during the bridge of track 9? -- Jens Campbell Tape trading list upon request. SASE required for international mail. From trobertson@utexas.edu Thu May 16 19:06:28 1996 Path: ashpoly!cascade!mxgate!coyoacan!utexas!trobertson From: trobertson@utexas.edu (Tyler Robertson) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996May16.190628.7637@utexas.edu> Date: Thu, 16 May 1996 19:06:28 GMT References: <1996May16.035028.7975@mit.edu> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 11 In article <1996May16.035028.7975@mit.edu>, jcampbell@mit.edu (Jens Campbell) 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. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Tyler Robertson Opinions expressed are solely my own and not those of University of Texas at Austin. ------------------------------------------------------------ From shughes@berkeley.edu Sat May 18 22:58:28 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!berkeley!shughes From: shughes@berkeley.edu (Sun-mi Hughes) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996May18.225828.6374@berkeley.edu> Date: Sat, 18 May 1996 22:58:28 GMT References: <1996May16.035028.7975@mit.edu> <1996May16.190628.7637@utexas.edu> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1996May16.190628.7637@utexas.edu>, trobertson@utexas.edu (Tyler Robertson) writes: > 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. > Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. -- Sun-mi Hughes "When every node is whole, the channel opens." 486DX2/66 (Linux 1.2.13) / FreeBSD 2.1