October 7, 2003

Zero Crossing  [ Edit ] 

When you have a piece of real sound (i.e. not a MIDI sequence), and you look at it on your computer, it’s displayed as wave that goes up and down over a horizontal axis. Wherever the wave crosses that axis is called a zero-crossing.

Why is this important? When you’re cutting up a recording into samples or loops or whatever, you have to start and end the sample on a zero-crossing. If you don’t, there will be an unpleasant pop, click, or other ugly noise. Sometimes, of course, that can be desirable, but only when you want that sound. Usually, stick to the zero crossings. In Logic’s Sample Editor, there’s a setting called Edit > Search Zero Crossings that will snap your anchor points to those zero crossings.

Posted by Joe | TrackBack
Comments


A good editing technique that I've had success with is putting short fades at the beginning and end of a loop, if you don't have a zero-crossing where you want it.

Posted by: fish at October 23, 2003 11:10 AM
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