From dsuzuki@delphi.com Mon Apr 04 07:17:16 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!delphi!dsuzuki From: dsuzuki@delphi.com (Dave Suzuki) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Apr04.071716.6583@delphi.com> Date: Mon, 04 Apr 1994 07:17:16 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 11 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- Dave Suzuki *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0 From knilsson@purdue.edu Wed Apr 06 02:55:16 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!purdue!knilsson From: knilsson@purdue.edu (Kirsty Nilsson) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Apr06.025516.2543@purdue.edu> Date: Wed, 06 Apr 1994 02:55:16 GMT References: <1994Apr04.071716.6583@delphi.com> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Apr04.071716.6583@delphi.com>, dsuzuki@delphi.com (Dave Suzuki) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. -- Kirsty Nilsson "There are 14 nodes and only 10 countries. Count again." 486DX2/66 (Linux 1.2.13) / AmigaOS 3.1 From klee@tum.de Thu Apr 07 01:51:16 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!klee From: klee@tum.de (Kenji Lee) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Apr07.015116.7958@tum.de> Date: Thu, 07 Apr 1994 01:51:16 GMT References: <1994Apr04.071716.6583@delphi.com> <1994Apr06.025516.2543@purdue.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Apr06.025516.2543@purdue.edu>, knilsson@purdue.edu (Kirsty Nilsson) 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. -- Kenji Lee | klee@tum.de PGP Key fingerprint: 5CAA 16C1 A972 6424 "Keep the channels open." From btanaka@panix.com Fri Apr 08 18:03:16 1994 Path: ashpoly!cascade!brgate!saturno!panix!btanaka From: btanaka@panix.com (Bill Tanaka) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Apr08.180316.8011@panix.com> Date: Fri, 08 Apr 1994 18:03:16 GMT References: <1994Apr04.071716.6583@delphi.com> <1994Apr06.025516.2543@purdue.edu> <1994Apr07.015116.7958@tum.de> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Apr07.015116.7958@tum.de>, klee@tum.de (Kenji Lee) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. 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. -- Bill Tanaka US Robotics Courier V.34 @ 28,800 bps "Tape doesn't lie at 02:14. Ears do." From itakahashi@clari.net Sat Apr 09 03:42:16 1994 Path: ashpoly!cascade!mxgate!coyoacan!clari!itakahashi From: itakahashi@clari.net (Ines Takahashi) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Apr09.034216.2405@clari.net> Date: Sat, 09 Apr 1994 03:42:16 GMT References: <1994Apr04.071716.6583@delphi.com> <1994Apr06.025516.2543@purdue.edu> <1994Apr07.015116.7958@tum.de> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Apr07.015116.7958@tum.de>, klee@tum.de (Kenji Lee) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. 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. -- Ines Takahashi *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0