Reference Manual
CHAPTER 9. TEMPO CONTROL AND WARPING 128
The Grain Size control determines the grain size used, but unlike in Tones Mode, this is a
setting that Live will use unaltered, without considering the signal's characteristics.
Fluctuation introduces randomness into the process. Larger values give more randomness.
9.3.4 Re-Pitch Mode
In Re-Pitch Mode, Live doesn't really time-stretch or compress the music; instead, it adjusts
the playback rate to create the desired amount of stretching. In other words, to speed
up playback by a factor of 2, it's transposed up an octave. This is like the DJ stretching
method of using variable-speed turntables to sync two records, or what happens to samples
in samplers when they're transposed.
The Transpose and Detune controls have no effect in Re-Pitch Mode.
9.3.5 Complex Mode
Complex Mode is a warping method specically designed to accommodate composite
signals that combine the characteristics covered by other Warp Modes; it works well for
warping entire songs, which usually contain beats, tones and textures.
Complex Mode is a rather CPU-intensive function, using approximately ten times the CPU
resources required by the other Warp Modes. As such, you may want to freeze tracks where
Complex Mode is used or record the results as a new clip to use as a substitute.
9.3.6 REX Mode
REX Mode differs from the other Warp modes in several ways. Most notably, it is not available
as an option in the Clip View's Sample Box, but is instead enabled automatically when
loading a le in REX format. REX les, associated with the program ReCycle by Propellerhead
Software, contain embedded tempo and timing information and will synchronize to your Set's
tempo just like any other audio le.