From yschneider@pipeline.com Fri Nov 10 19:00:19 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!pipeline!yschneider From: yschneider@pipeline.com (Yuki Schneider) Newsgroups: comp.dsp Subject: Discussion: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov10.190019.4279@pipeline.com> Date: Fri, 10 Nov 1995 19:00:19 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 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). This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Yuki Schneider "5 sigma is a discovery. 7 is a question." Decstation 5000/200 / TOS 4.04 From kpark@delphi.com Sun Nov 12 22:54:19 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!delphi!kpark From: kpark@delphi.com (Karen Park) Newsgroups: comp.dsp Subject: Re: Discussion: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov12.225419.4630@delphi.com> Date: Sun, 12 Nov 1995 22:54:19 GMT References: <1995Nov10.190019.4279@pipeline.com> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Nov10.190019.4279@pipeline.com>, yschneider@pipeline.com (Yuki Schneider) 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. -- Karen Park Opinions expressed are solely my own and not those of Delphi Internet Services. ------------------------------------------------------------ From mperez@purdue.edu Tue Nov 14 10:35:19 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!purdue!mperez From: mperez@purdue.edu (Mei Pérez) Newsgroups: comp.dsp Subject: Re: Discussion: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov14.103519.8819@purdue.edu> Date: Tue, 14 Nov 1995 10:35:19 GMT References: <1995Nov10.190019.4279@pipeline.com> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Nov10.190019.4279@pipeline.com>, yschneider@pipeline.com (Yuki Schneider) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. -- Mei Pérez *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From ssato@rwth-aachen.de Wed Nov 15 20:26:19 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!rwth-aachen!ssato From: ssato@rwth-aachen.de (Steve Sato) Newsgroups: comp.dsp Subject: Re: Discussion: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov15.202619.6762@rwth-aachen.de> Date: Wed, 15 Nov 1995 20:26:19 GMT References: <1995Nov10.190019.4279@pipeline.com> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Nov10.190019.4279@pipeline.com>, yschneider@pipeline.com (Yuki Schneider) 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. -- Steve Sato *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0