Take for example the picture of a sine starting at zero, then moving up to the thighest point, then down, crossing zero to the lowest point and going back to zero again. one full cycle. (simplyfied example)
if you take the same sine but start with a downmovement, its "phase" is inverted. when you have 2 identical signals, and you invert the phase of one of them, they´ll cancel eachother out and you wont hear anything. those phase cancellations can be a problem when recording with microphones. for example when you mic a snare drum from above and below and you mix those two togehter, you have to invert the phase of one of the two signals.
i guess i did not explain it too well.. *L
however - thats inverting the phase - spinning the signal around the zero-axis.
shifting the phase is moving the signal along the time axis. (gimme a pen and a paiece of paper and i can show you *LOL*
Shifting does alter the sound whilst inverting does not
[Edited by Azrael on 12-15-2003 at 05:22 AM]
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