[nemo1618]

You certainly do not need to play music at the speed the performer intended! There are whole genres (and subgenres) based on this. :) Personally, I have found that slowing a familiar piece down by ~5% tricks my brain into perceiving it as novel again, which helps me attend to it more closely and appreciate it more.

[xboxnolifes]

Them being entire genres, to me, implies they are no longer the same music. You are listening to a different song.