Ai tool for create And remix songs

I would like to have an ai tool where fitness instructor could ask to create playlist with specific characteristics ( bpm- 90’song - latino rock ) and mix them to create only one music track long 30/40 minutes . If is possible possibility to change original bpm and possibility to download the track.
Other function very important it will be something to don’t violate copyright of songs it will be something to change a little bit original song to could use track without violate copyright