Apple Logic Express 7 - Manual (Page 292)

292 Chapter 11 Sample Editor
Time and Pitch Machine
The Time Machine allows you to radically alter the time structure of audio files,
including time compression/expansion, and pitch transposition. When changing the
pitch, you can also correct any alteration of the formants. Pitch shifting without
formant correction causes a phenomenon commonly known as the “Mickey Mouse”
effect.
Overview of the Time and Pitch Machine features:
• Time compression or expansion without transposition,
• Pitch transposition with or without altering the length and tempo,
• Correction or alteration of the timbre (sonic character),
• any combination of these functions.
• Consider the Time Machine to be a universal tool for control of the pitch, tempo, and
sonic character of digital recordings. Each of these parameters can be addressed
independently. The current settings are visually represented by the position of a ball
in a 3-dimensional graphic display, where the axes are time, pitch, and timbre (sonic
character).
Opening the Time and Pitch Machine
To open the Time Machine, select Factory > Time and Pitch Machine.
Parameters
Most of the parameters are mutually dependent; you don’t need to enter them all to
get a good result. We suggest that you don’t adjust a parameter unless you know what
the value should be.
The left “column” (Original) displays the present value, and the right column
(Destination) is used for entry of the desired target value for the edit.
Tempo Change (%)
Tempo alteration in percent. (There is no original value shown).