From dnakamura@earthlink.net Sun Mar 20 09:53:37 1994 Path: ashpoly!cascade!transat!ukc!fennimore!earthlink!dnakamura From: dnakamura@earthlink.net (Dong-hyun Nakamura) Newsgroups: comp.dsp Subject: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Mar20.095337.8417@earthlink.net> Date: Sun, 20 Mar 1994 09:53:37 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 11 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. 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? -- Dong-hyun Nakamura Opinions expressed are solely my own and not those of EarthLink Network. ------------------------------------------------------------ From ssantos@tum.de Sun Mar 20 22:31:37 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!tum!ssantos From: ssantos@tum.de (Steve Santos) Newsgroups: comp.dsp Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Mar20.223137.2805@tum.de> Date: Sun, 20 Mar 1994 22:31:37 GMT References: <1994Mar20.095337.8417@earthlink.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1994Mar20.095337.8417@earthlink.net>, dnakamura@earthlink.net (Dong-hyun Nakamura) 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Steve Santos *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From rkowalski@u-tokyo.ac.jp Mon Mar 21 16:48:37 1994 Path: ashpoly!cascade!bigsur!u-tokyo!rkowalski From: rkowalski@u-tokyo.ac.jp (Renata Kowalski) Newsgroups: comp.dsp Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Mar21.164837.4861@u-tokyo.ac.jp> Date: Mon, 21 Mar 1994 16:48:37 GMT References: <1994Mar20.095337.8417@earthlink.net> <1994Mar20.223137.2805@tum.de> Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1994Mar20.223137.2805@tum.de>, ssantos@tum.de (Steve Santos) writes: > Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. > My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! You're overlooking tape wow and flutter. A Revox B77 has at least 0.05% speed drift, which would smear a 14 Hz line across several bins. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Renata Kowalski Hayes Optima 288 @ 19,200 bps "There are 14 nodes and only 10 countries. Count again." From dstewart@pipeline.com Wed Mar 23 00:07:37 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!pipeline!dstewart From: dstewart@pipeline.com (Dong-hyun Stewart) Newsgroups: comp.dsp Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Mar23.000737.9848@pipeline.com> Date: Wed, 23 Mar 1994 00:07:37 GMT References: <1994Mar20.095337.8417@earthlink.net> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Mar20.095337.8417@earthlink.net>, dnakamura@earthlink.net (Dong-hyun Nakamura) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- === Dong-hyun Stewart === Dept of Electrical Engineering, The Pipeline Internet Network "Hold for relay."