Apple Logic Pro X - Manual (Page 387)

Chapter 14 Edit the timing and pitch of audio 387
Edit the timing of audio
Flex Time algorithms and parameters
Flex Time algorithms are track-based settings that determine how the timing or pitch of your
audio material will be altered—using time compression or expansion, manipulating invisibly
sliced segments, or speeding up or slowing down the material. You can choose an algorithm
based on the type of audio material you’re working with. Each algorithm comes with its own
individual parameters, located in the Track inspector.
You can also have Logic Pro choose the most suitable Flex Time algorithm based on an
automatic analysis of your audio material.
Flex options are only available in the Track inspector when Show Advanced Tools is selected
in the Advanced preferences pane.
Flex pop-up menu
Flex parameters
Note: When you choose a flex algorithm for a track, the Freeze Mode parameter in the Track
inspector switches from Pre Fader to Source Only. This freezes the track signal without any effects
plug-ins. For details, see
Freeze tracks .
Have Logic Pro choose a Flex Time algorithm
m In the Tracks area or Audio Track Editor, choose Flex Time - Automatic from the Flex
pop-up menu.
The resulting algorithm is chosen as follows:
•
Monophonic for monophonic audio material—bass line, for example
•
Slicing for percussive, non-tonal audio material—drums, for example
•
Polyphonic for chords, or complex material—mixes, for example
Use the Slicing algorithm
m Choose Flex Time - Slicing from the Flex pop-up menu.
Slicing cuts the audio material at transient markers, then shifts the audio while playing each
slice at its original speed. No time compression or expansion is applied to the shifted audio. Any
gaps that occur as a result of shifting the audio can be filled using the decay function. Slicing is a
good choice for drums and percussion and comes with the following parameters:
•
Fill Gaps: Turns the decay function on or off, allowing you to fill any gaps that occur between
sounds as a result of shifting the audio.
•
Decay: Sets the decay time between sounds, because no time stretching takes place to
compensate for the gaps.
•
Slice Length: Shortens each slice by a percentage value. Shortening slices can be helpful for
removing unwanted pre-attack sounds from the following slice, or to create a gated effect.