From sdubois@uni-hamburg.de Tue Aug 16 03:15:33 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uni-hamburg!sdubois From: sdubois@uni-hamburg.de (Sergei Dubois) Newsgroups: comp.dsp Subject: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Aug16.031533.3320@uni-hamburg.de> Date: Tue, 16 Aug 1994 03:15:33 GMT Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 10 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. -- Sergei Dubois Tape trading list upon request. SASE required for international mail. From nmoreno@stanford.edu Tue Aug 16 22:24:33 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!stanford!nmoreno From: nmoreno@stanford.edu (Nadia Moreno) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Aug16.222433.6488@stanford.edu> Date: Tue, 16 Aug 1994 22:24:33 GMT References: <1994Aug16.031533.3320@uni-hamburg.de> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 8 In article <1994Aug16.031533.3320@uni-hamburg.de>, sdubois@uni-hamburg.de (Sergei Dubois) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. 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. -- Nadia Moreno -- Stanford University Computer Systems Lab "Hardware is temporary. The signal survives." From yokonkwo@ox.ac.uk Wed Aug 17 02:55:33 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!ox!yokonkwo From: yokonkwo@ox.ac.uk (Yuki Okonkwo) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Aug17.025533.4945@ox.ac.uk> Date: Wed, 17 Aug 1994 02:55:33 GMT References: <1994Aug16.031533.3320@uni-hamburg.de> <1994Aug16.222433.6488@stanford.edu> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Aug16.222433.6488@stanford.edu>, nmoreno@stanford.edu (Nadia Moreno) writes: > 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. 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. Unsubscribe me from this list! (Wait, this is Usenet, never mind). -- Yuki Okonkwo Tape trading list upon request. SASE required for international mail. From hweber@cmu.edu Thu Aug 18 12:51:33 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!cmu!hweber From: hweber@cmu.edu (Hugo Weber) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Aug18.125133.5582@cmu.edu> Date: Thu, 18 Aug 1994 12:51:33 GMT References: <1994Aug16.031533.3320@uni-hamburg.de> <1994Aug16.222433.6488@stanford.edu> Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Aug16.222433.6488@stanford.edu>, nmoreno@stanford.edu (Nadia Moreno) writes: > 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. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- === Hugo Weber === Dept of Electrical Engineering, Carnegie Mellon University School of CS "Tape doesn't lie at 02:14. Ears do." From jlee@inria.fr Fri Aug 19 19:16:33 1994 Path: ashpoly!cascade!mxgate!coyoacan!inria!jlee From: jlee@inria.fr (Jen Lee) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Aug19.191633.9044@inria.fr> Date: Fri, 19 Aug 1994 19:16:33 GMT References: <1994Aug16.031533.3320@uni-hamburg.de> <1994Aug16.222433.6488@stanford.edu> <1994Aug18.125133.5582@cmu.edu> Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Aug18.125133.5582@cmu.edu>, hweber@cmu.edu (Hugo Weber) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. 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. -- Jen Lee *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0