Time travel may not be possible yet, but you can change the speed of a sound without changing its pitch. :) In the past, changing the speed or playback rate of a sound resulted in changing the pitch, also known as the dreaded "chipmunk" effect.
A sound can be in two modes.
•Adjust To Project Tempo
•Time Stretch By
Adjust To Project Tempo
If the sound is in "Adjust To Project Tempo" mode, Mixcraft will adjust the sound based on the difference between the project's tempo and the sound's detected tempo. For example, if the project tempo was 120 bpm and the sound's detected tempo was 60 bpm, it would time stretch the sound to be half as long, because it would be playing the sound back two times as fast.
However, you can have more than one tempo change in a project. For example, in a transition between two songs, you could slowly ramp the tempo up with multiple tempo changes.. In this mode, the sound keeps perfect synchronization and adjusts the playback rate based on the latest tempo change.
The main thing about this mode is that you can mix and match loops of various tempos and it will always line up. A measure is a measure, regardless of tempo.
Time Stretch By
In this mode, the sound is simply time stretched by a fixed amount. The sound will not adjust to the project tempo.
Learn more about tempo and time stretching.