10.6

Table Of Contents
345Logic Pro User Guide
Time stretch MIDI regions
In Logic Pro, Option-drag the left or right edge of one or more MIDI regions.
The events within the region are stretched or compressed, proportionately, by the
amount that the MIDI region is altered in length.
Time stretch or compress audio regions
In Logic Pro, Option-drag the right edge of one or more audio regions.
This action stretches or compresses the audio by the amount that the region is altered
in length, and replaces the original region with a new PCM audio file (in the original file
format, or AIFF, if the original was not PCM).
Time stretching is limited to the value of the current Tracks area grid setting (in the Snap
pop-up menu).
Choose the audio time stretching algorithm
In Logic Pro, choose Edit > Time Stretch > Time Stretching Algorithm, then choose an
algorithm from the submenu.
Universal: This high-quality algorithm, the default, is able to handle any kind of
audio material and is recommended for most time-stretching tasks. The other two
algorithms can sometimes deliver better results when the audio material exactly
matches the outlined specifications.
Complex: Choose this algorithm to obtain natural-sounding results when time-
stretching complex musical material—orchestral music or final mixes.
Percussive: Perfectly maintains the timing of rhythmic material, making it a good
choice for drum loops and percussive, nonharmonic signals. In comparison to
the Beats Only algorithm, the Percussive algorithm is better suited for percussive
material that has been processed through a reverb (or contains a long tail). This may
also apply to percussive playing styles, such as staccato electric piano or clavinet
parts. Beats Only may be the better alternative for dry drum recordings.
The following algorithms are located in the Legacy submenu:
Version 5: Inherited from Logic 5, this algorithm can be used on most types of audio
material. It imparts a particular color on processed audio, which may be a useful
creative option.
Any Material: Can handle most types of audio material.
Monophonic: A specialized algorithm for monophonic material—an individual voice,
or brass or woodwind instrument, for example.
Pads: Use on polyphonic material with harmonic content—choirs or string sections
are good examples.
Rhythmic Material: Use on rhythmic material—can be drums and percussion, but less
obviously rhythm guitar, clavinet, and piano comp parts.
Beats Only: Perfectly maintains the timing of percussive material. This algorithm
should be your first choice for all kinds of dry drum loops.