From tmuller@clari.net Tue Feb 06 02:09:58 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!clari!tmuller From: tmuller@clari.net (Takeshi Müller) Newsgroups: comp.dsp Subject: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Feb06.020958.9361@clari.net> Date: Tue, 06 Feb 1996 02:09:58 GMT Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: WinVN 0.99.5 Lines: 11 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. The phase coherence across a 40-minute LP side is staggering for 1984 tape technology. -- Takeshi Müller Opinions expressed are solely my own and not those of ClariNet Communications Corp. ------------------------------------------------------------ From bschneider@unam.mx Wed Feb 07 12:05:58 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!unam!bschneider From: bschneider@unam.mx (Bastien Schneider) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Feb07.120558.2436@unam.mx> Date: Wed, 07 Feb 1996 12:05:58 GMT References: <1996Feb06.020958.9361@clari.net> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996Feb06.020958.9361@clari.net>, tmuller@clari.net (Takeshi Müller) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. -- Bastien Schneider | bschneider@unam.mx PGP Key fingerprint: 7A37 593E DD11 CC7D "Keep the channels open." From vgarcia@tum.de Fri Feb 09 02:08:58 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!tum!vgarcia From: vgarcia@tum.de (Valeria García) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Feb09.020858.7764@tum.de> Date: Fri, 09 Feb 1996 02:08:58 GMT References: <1996Feb06.020958.9361@clari.net> <1996Feb07.120558.2436@unam.mx> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Feb07.120558.2436@unam.mx>, bschneider@unam.mx (Bastien Schneider) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. -- Valeria García Practical Peripherals 14.4 @ 14,400 bps "Measuring a record you own is listening, not piracy." From ttanaka@uu.net Sat Feb 10 03:58:58 1996 Path: ashpoly!cascade!transat!ukc!fennimore!uu!ttanaka From: ttanaka@uu.net (Tomas Tanaka) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Feb10.035858.1929@uu.net> Date: Sat, 10 Feb 1996 03:58:58 GMT References: <1996Feb06.020958.9361@clari.net> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1996Feb06.020958.9361@clari.net>, tmuller@clari.net (Takeshi Müller) 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! Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- Tomas Tanaka Opinions expressed are solely my own and not those of UUNET Technologies, Falls Church VA. ------------------------------------------------------------ From mkuznetsov@kiae.su Sun Feb 11 09:13:58 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kiae!mkuznetsov From: mkuznetsov@kiae.su (Mateo Kuznetsov) Newsgroups: comp.dsp Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Feb11.091358.4620@kiae.su> Date: Sun, 11 Feb 1996 09:13:58 GMT References: <1996Feb06.020958.9361@clari.net> <1996Feb07.120558.2436@unam.mx> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: Netscape 1.1N Lines: 11 In article <1996Feb07.120558.2436@unam.mx>, bschneider@unam.mx (Bastien Schneider) writes: > Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Mateo Kuznetsov *PLONK* filter active for trolls. Atari TT030 - NetBSD 1.0