Thought I’d revive the thread to say that the new Digitakt update is HUGE for time stretching. Also there’s a subtle bugfix in 1.3 that I didn’t see in the release notes - when time stretching the LFO depth is now 60 instead of 30 to span the whole sample index range of 120. This makes more sense because 60 is half of 120 and the SAW LFO is bipolar. Also the new LFO view makes it way easier to tell what’s going on.
Anyways I’m working on a follow up tutorial series on it but for now I’m just having fun. I chopped up some breakbeats and a couple cheesy samples just messing around having fun, let me know what you think.
Lastly thanks to the devs for this awesome update 
https://www.youtube.com/watch?v=0yKpc5c7PnI