Interpolating a Song

If you want to use someone else's song there are roughly three things that you can do. You can make a cover which is basically redoing all of the melody and the lyrics with maybe slight variation but staying really close to the original or sample a song where you actually take the original recording and put it into a new song. The last thing you can do is you can interpolate a song which is that you're going to borrow a musical element from another song. People like to update old hits that are still in the cultural memory still interesting but maybe have faded just a little bit and then updating them and bringing them back.