What is the best timestretch algorithm?


Does anyone know if there are any posts on how to choose the right
algorithm for timestretching. I have tried to understand the manual, but I don’t
think it gives enough concrete examples for me being able to understand.

so for example, which setting is best for drums, which one is best for guitar and bass, and which one
is best for vocals, and lastly what do I need all the other algorithms for?

As far as I know the elastique is in genereal the best. But why do I still need some of thee other ones then.

There really isn’t a ‘best’ algorithm for drums (or whatever) in general although there can be a best one for the specific drum recording you are using. Each algorithm will color the sound in its own way & only you can judge which sounds best or most appropriate on the material - that might even be a supposedly wrong algorithm. The manual does describe what type of material each is optimized for (poly/mono etc.), which can suggest which to try. Compare some different algorithms on your audio & choose the one you like (or dislike the least as the case may be).

Alternatively if the first algorithm you try sounds OK, just use it to save your time and move on.

An article I read here https://www.musictech.net/2018/10/time-stretching-and-pitch-shifting-in-cubase/
suggests otherwise. (the relevant commment is under Using Algorithms section) MPEX is supposed to be the better of the two, but I think it is taste and test.

I just had to master an audio stereo 24 bit 44.1khz EDM track that needed to change BPM, it was lolloping at 121BPM and I Time Stretched it to 126BPM ( as well as muck about with a straying tempo before doing so.) and I needed it to stay at the same pitch. I am working in a 24 bit project file.

I tried MPEX Complex,the the highest setting, and it took a while to complete but the end result though crisp had a feeling I can’t explain but it felt slightly clinically stripped, a bit cold somehow and I could notice it the most in the tom sounds. So I went with Elastique Formant Time. And that did the job and a lot quicker, leaving the indefinable warm feeling that MPEX was stripping out, though I may try MPEX Musical mode if I have to do this again, since it worked well enough this time, I am moving on.