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| Convolution Reverb and Beyond Written by John Duesenberry - © 2005, PRIMEDIA Business Magazines & Media Inc. Reprinted with Permission. |
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I'll start with an example of stereo convolution reverb, and then demonstrate how easy it is to generate a much less conventional reverblike effect using a sample of a crash cymbal in place of the IR signal. Hack Away Many sample editors and other audio applications now support convolution. Here, I'll use SoundHack, Tom Erbe's Mac OS shareware utility. SoundHack is easy to set up and use, but you should keep two things in mind. Under OS 9, your should set the memory partition to at least 16 MB before performing the examples here. Under OS X, SoundHack may not recognize your audio interface, in which case you'll need to temporarily set the Default Output to Built-in Audio in the Audio MIDI Setup utility. You'll find my audio source sound files on the EM Web site. For more details on convolution theory, see “Square One: Convolution Number Nine” in the June 1999 issue of EM. This is an excerpt from the following article: Convolution Reverb and Beyond. To stay informed about new articles, be sure to click here to sign up for the DigiFreq Music Technology Newsletter. It's free!
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