This only works of course if the slices are in the right place. This has the effect of making it sound an octave higher, but it plays back at the original tempo. It also uses a formant preserving algorithm so that only parts of the sound are sped up, and the formants are left at the original pitch (to stop it sounding like the chipmonks when sped up). So for the example of playing something an octave higher, a groove clip will play back each individual slice twice as fast, but stretches the the audio in such a way that it fills up the whole slice.
This means that if you're increasing the pitch of an audio clip, although it still speeds the audio up, it speeds up the individual "slices" in such a way so that each individual slice always ends up on the same beat it did in the original file. In effect, you're "slicing" the audio up into the beats (or fractions of beats) that it contains. What groove clips do is store where the various beats (or quarter notes, eighth notes or 16th notes) lie within your audio clip, and store this information inside the audio file. However, now the audio is now also twice the tempo. Decreasing the pitch of the audio means playing it back slower, but this also affects the timing, as it's now playing back at a slower tempo.įor example, to make the pitch an octave higher, you play the audio back at twice the speed.
Normally, to increase the pitch of an audio file, you would speed it up - however this also affects the timing, as you're now playing it faster. The reason you would normally want to create groove clips, is so you can change the key and the tempo of some audio to suit your composition.
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