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Article #781Re: detecting activity on LineIn
From: Lucian Wischik
Date: Wed, 24 Jul 2002 12:08
Date: Wed, 24 Jul 2002 12:08
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"Andrei" <address@in.the.sig> wrote in message news:3d3e9382$1_1@dnews... > My understanding is that for speed applications and non-precision work, FFT > should you use as few "features" as possible. For example, do I need to use > windowing functions for an FFT in order to write a functioning spectral > view? Windowing features are irrelevant, I'm pretty sure. Your code will spend 99% of its time in your FFT loop, and 1% of time doing windowing stuff, so you'll get insignificant gains by cutting it out. I know nothing about FFT! Well, we had a lecture on it, and also something about gabor wavelets (a sort of halfway house between the frequency domain (FFT) and the time domain (raw data)) but I never really understood it. I merely copied out my FFT code from somewhere else. If you'd be able to send me that assembly code, I'd love to see it! (I am lu@wischik.com) -- Lucian
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 10d0fc,9d38a1cf9379a951 X-Google-Attributes: gid10d0fc,public X-Google-ArrivalTime: 2002-07-24 05:43:04 PST From: "Lucian Wischik" <lu.brn@wischik.com> Newsgroups: borland.public.cppbuilder.multimedia References: <3d355327_1@dnews> <3d3c07ed_2@dnews> <3d3de3c9$1_2@dnews> <3d3e7dd6$1_1@dnews> <3d3e9382$1_1@dnews> Subject: Re: detecting activity on LineIn Date: Wed, 24 Jul 2002 14:08:26 +0200 Lines: 25 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 NNTP-Posting-Host: 130.136.6.99 Message-ID: <3d3e9968_1@dnews> X-Trace: dnews 1027512680 130.136.6.99 (24 Jul 2002 05:11:20 -0700) Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!sn-xit-02!sn-xit-06!sn-xit-04!supernews.com!newspump.sol.net!news-xfer.siscom.net!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!colt.net!newsfeed.esat.net!diablo.theplanet.net!newsfeed.icl.net!newsfeed.fjserv.net!lnewspeer00.lnd.ops.eu.uu.net!emea.uu.net!newsfeed01.sul.t-online.de!t-online.de!dnews