Article View: borland.public.cppbuilder.multimedia
Article #780Re: detecting activity on LineIn
From: Andrei
Date: Wed, 24 Jul 2002 11:46
Date: Wed, 24 Jul 2002 11:46
22 lines
1873 bytes
1873 bytes
Good stuff, thank you. I have been trying to write my own spectral view using FFT code that I have. I also got assembly code from the book called Digital Audio Processing. This is supposed to be ultra-fast, however the author threw in some VC++ specific stuff so I was not able to figure it out and get it to work. If you want to take a look at that, please e-mail me at the address below. 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? I was actually able to get FFT code that I have to convolute a signal and then get it back but in places where original signal was near 0 dB I got clicks in deconvoluted result. Why is that? Sorry that I am bothering you with this stuff, people who know it are really hard to find :) -- Andrei REMOVE_sezna2000@yahoo.com
Technical Details
Message-ID:
<3d3e9382$1_1@dnews>Path:
arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!sn-xit-02!sn-xit-06!sn-xit-04!supernews.com!newsfeed.gamma.ru!Gamma.RU!newsfeeder.edisontel.com!nntp.infostrada.it!newsfeed01.sul.t-online.de!t-online.de!dnewsReferences:
<3d355327_1@dnews> <3d3c07ed_2@dnews> <3d3de3c9$1_2@dnews> <3d3e7dd6$1_1@dnews>Show Full Headers
Complete Article Headers
X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 10d0fc,9d38a1cf9379a951 X-Google-Attributes: gid10d0fc,public X-Google-ArrivalTime: 2002-07-24 05:40:01 PST Newsgroups: borland.public.cppbuilder.multimedia Subject: Re: detecting activity on LineIn From: "Andrei" <address@in.the.sig> Reply-To: address@in.the.sig References: <3d355327_1@dnews> <3d3c07ed_2@dnews> <3d3de3c9$1_2@dnews> <3d3e7dd6$1_1@dnews> Organization: Evil Organization Date: Wed, 24 Jul 2002 11:46:17 GMT X-Newsreader: News Rover 7.4.3 (http://www.NewsRover.com) NNTP-Posting-Host: 24.90.136.72 Message-ID: <3d3e9382$1_1@dnews> X-Trace: dnews 1027511170 24.90.136.72 (24 Jul 2002 04:46:10 -0700) Lines: 22 Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!sn-xit-02!sn-xit-06!sn-xit-04!supernews.com!newsfeed.gamma.ru!Gamma.RU!newsfeeder.edisontel.com!nntp.infostrada.it!newsfeed01.sul.t-online.de!t-online.de!dnews