Ableton Live has 6 different warp mode types.
These modes are how Live will play back and stretch audio when it is set to a different tempo than the original recording. How each mode algorithm works to manipulates audio is more evident at slower tempos.
Beats mode is designed for drum loops, where there are short transients to manipulate, and is the default warp mode. The “Preserve” below the warp mode lets you to select how to shape the beat transients. You can warp to 16th notes, 8th notes, to the bar, etc. Or you can use Transients to shape at a granular level. It will loop over the audio file transients to recreate the most accurate sound of the original file. Beats mode is perfect for drum tracks, or other kinds of rhythms, but is not ideal for melodic audio clips.
Tones mode is designed for anything with a clear pitch like vocals, lead guitar, bass lines, etc. You want a sound that doesn’t emphasize rhythm. You can adjust the Grain Size to shorter or larger settings. The grain size is how the audio file is broken up into parts to warp.
Texture Mode is perfect for creating experimental, wild sounds. Its similar to the Grain Size warp structure in Tones, but and adds the Flux parameter. Texture warp mode is for sounds that don’t have complex melodic or pitch properties you want to keep, like pads or ambient sounds. Playing with the Flux parameter can help you create some very, very interesting atmospheric and ambient sounds. Love it!
Re-Pitch mode is how turntables work. It speeds up or slows down the audio to match the global tempo in your project. You won’t hear the warp artifact sounds here because the audio itself is repitched to match the speed. If you want to preserve pitches and notes, this is not the mode for you, but it’s sometimes a good choice for drums though.
Complex mode is designed to warp entire song files or other complex audio. Complex is the most CPU intensive out of all warp modes. It attempts to preserve all of the rhythmic and tonal qualities of the audio file.
Complex Pro is similar to Complex mode, but adds the Format and Envelope parameters, most suitable for vocal track remixes. Formants adjust the extent of compensation to the sample and tries to preserve the natural “throat” sound of the human voice. Envelope adjusts spectral qualities of the file. Ableton recommends the default value of 128 for most audio and trying lower values for samples with higher pitched ranges and vice versa for lower sonic ranges.