Lexicon PCM NATIVE PITCH SHIFT, Owner'S Manual

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Pitch Shift
Pitch Shifting is commonly used in sound design for film and for correcting pitch when
converting between different frame rates. In music, it is generally used for shifting the pitch
of vocals (for effect) or an instrument (usually when single notes are played, such as in a guitar
solo). It can also be used for very dramatic shifting effects; if you are after that “Demonic”
sounding voice or “Chipmunk” effect, then this is the algorithm to use.
In the Pitch Shift algorithm, pitch can be adjusted using one of two types: Musical or Percent.
In Musical mode, pitch can be adjusted in semitones (-12 to 12) and/or cents (-50 to 50). In
Percent mode, pitch can be adjusted between -60% and 60%. This algorithm also provides
control over crossfade, low shift cutoff frequency, smart shift and correlation.