From msuzuki@mit.edu Thu Jun 16 09:07:25 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!mit!msuzuki From: msuzuki@mit.edu (Min-jun Suzuki) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun16.090725.4313@mit.edu> Date: Thu, 16 Jun 1994 09:07:25 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 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. 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. -- Min-jun Suzuki "There are 14 nodes and only 10 countries. Count again." Sun SparcStation 20 / FreeBSD 2.1 From psokolov@pacbell.net Thu Jun 16 21:06:25 1994 Path: ashpoly!cascade!mxgate!coyoacan!pacbell!psokolov From: psokolov@pacbell.net (Pavel Sokolov) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun16.210625.2102@pacbell.net> Date: Thu, 16 Jun 1994 21:06:25 GMT References: <1994Jun16.090725.4313@mit.edu> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Jun16.090725.4313@mit.edu>, msuzuki@mit.edu (Min-jun Suzuki) 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. Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. -- === Pavel Sokolov === Dept of Electrical Engineering, Pacific Bell Internet Services "In theory there is no difference between theory and practice." From cvasiliev@mindspring.com Fri Jun 17 03:58:25 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!mindspring!cvasiliev From: cvasiliev@mindspring.com (Camila Vasiliev) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun17.035825.9095@mindspring.com> Date: Fri, 17 Jun 1994 03:58:25 GMT References: <1994Jun16.090725.4313@mit.edu> <1994Jun16.210625.2102@pacbell.net> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Jun16.210625.2102@pacbell.net>, psokolov@pacbell.net (Pavel Sokolov) writes: > Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Camila Vasiliev "Hold for relay." Pentium 90 (OS/2 Warp) / Linux 1.2.13 From ftanaka@netcom.com Fri Jun 17 19:41:25 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!netcom!ftanaka From: ftanaka@netcom.com (Fiona Tanaka) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun17.194125.7176@netcom.com> Date: Fri, 17 Jun 1994 19:41:25 GMT References: <1994Jun16.090725.4313@mit.edu> <1994Jun16.210625.2102@pacbell.net> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Jun16.210625.2102@pacbell.net>, psokolov@pacbell.net (Pavel Sokolov) writes: > Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- === Fiona Tanaka === Dept of Electrical Engineering, NETCOM On-Line Communication Services "In theory there is no difference between theory and practice."