When you drop an audio clip into Ableton, it guesses the tempo and applies one of its warping algorithms. If it guesses wrong, you can use the “:2” and “*2” buttons to quickly double or halve the tempo. You can also use this feature to stretch a clip out to extreme lengths, completely changing its sound.
Load a sample into Ableton, then enable warping and set the mode to “Texture.” Here, Ableton’s (correctly) guessed that the sample’s BPM is about 85.
Keep clicking the “*2” button until Ableton stops doubling the tempo:
If you want to stretch audio beyond Ableton’s capabilities, try using Paul’s Extreme Sound Stretch.
Here’s Birdfeeder’s version of the Jurassic park theme song, stretched out to an hour: