10.6

Table Of Contents
434Logic Pro User Guide
Use the Monophonic algorithm
In Logic Pro, choose Flex Time - Monophonic from the Flex pop-up menu.
Monophonic is designed to be used on melodic instruments only playing a single note at
a time, and is therefore good for solo vocals and monophonic solo instruments—melody
and bass lines, for example. When you use this flex algorithm, your recording should
be relatively dry, without audible reverberation. Otherwise, you may want to try using
Polyphonic. Monophonic comes with a single parameter:
Percussive: Preserves the area around transient markers to protect the percussive
part of the sound. If selected, allows better timing for all kinds of percussive
monophonic tonal material, such as plucked strings (guitar, bass) or tonal
percussion. If unselected, prevents glitches on transient markers in non-percussive
tonal material, such as bowed strings or wind instruments.
Use the Polyphonic algorithm
In Logic Pro, choose Flex Time - Polyphonic from the Flex pop-up menu.
Polyphonic time stretches material based on a process called phase vocoding—a
process that uses phase information to time stretch an audio signal without touching
its pitch. It is the most processor intensive of all the flex algorithms, but it delivers
high sonic quality with suitable polyphonic material. It’s recommended for complex
polyphonic material and is good for all kinds of chords—such as guitar, piano, and
choir—and also complex mixes. Polyphonic comes with a single parameter:
Complex: Enables more internal transients in the audio material.
Use the Tempophone algorithm
In Logic Pro, choose Flex Time - Tempophone (FX) from the Flex pop-up menu.
Tempophone emulates the effect of an historical tape-based time-stretching device
known as a tempophone, and results in a mechanical sound with many artifacts similar
to those produced with granular synthesis techniques. Tempophone is intended to be
used creatively for special effects and comes with the following parameters:
Grain Size: Sets the size of the grains that are played or repeated in their original
speed and crossfaded to create time compression or expansion.
Crossfade: Adjusts the crossfade length from 0.00, which produces hard artifacts, to
the full grain length of 1.00, which tends to sound softer.
Use the Speed algorithm
In Logic Pro, choose Flex Time - Speed (FX) from the Flex pop-up menu.
Speed time stretches material by playing the source material faster or slower, including
pitch change. Because of the pitch shifting, this flex algorithm is mainly useful for
percussive material, but it can be used on all material for interesting creative effects.