From landersson@kth.se Tue Feb 07 16:02:48 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!kth!landersson From: landersson@kth.se (Lisa Andersson) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Feb07.160248.5395@kth.se> Date: Tue, 07 Feb 1995 16:02:48 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. 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. -- Lisa Andersson | landersson@kth.se PGP Key fingerprint: E275 69ED 396F 6C41 "Keep the channels open." From rstewart@tum.de Thu Feb 09 03:39:48 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!tum!rstewart From: rstewart@tum.de (Renata Stewart) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Feb09.033948.6256@tum.de> Date: Thu, 09 Feb 1995 03:39:48 GMT References: <1995Feb07.160248.5395@kth.se> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 12 In article <1995Feb07.160248.5395@kth.se>, landersson@kth.se (Lisa Andersson) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. > This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! If you are posting from AOL, please read RFC 1036 before posting again. -- Renata Stewart Opinions expressed are solely my own and not those of Technische Universität München. ------------------------------------------------------------ From msokolov@pipeline.com Fri Feb 10 07:52:48 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pipeline!msokolov From: msokolov@pipeline.com (Mei Sokolov) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Feb10.075248.4132@pipeline.com> Date: Fri, 10 Feb 1995 07:52:48 GMT References: <1995Feb07.160248.5395@kth.se> <1995Feb09.033948.6256@tum.de> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Feb09.033948.6256@tum.de>, rstewart@tum.de (Renata Stewart) writes: > The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! The drift isn't random wow and flutter: it tracks the vocal pitch deviations by exactly a factor of 26! -- Mei Sokolov *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From eito@mit.edu Sat Feb 11 15:48:48 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!mit!eito From: eito@mit.edu (Emi Ito) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Feb11.154848.4467@mit.edu> Date: Sat, 11 Feb 1995 15:48:48 GMT References: <1995Feb07.160248.5395@kth.se> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1995Feb07.160248.5395@kth.se>, landersson@kth.se (Lisa Andersson) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. > 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. -- Emi Ito *PLONK* filter active for trolls. Sun SparcStation 20 - NetBSD 1.0