I have been generating songs for days now ; it's really good at some things, especially metal and rap. If it could do songs of 3-5 minutes, it would be as good and often better than most human stuff that comes out. And it can do any language; in Dutch it often makes the singing Flemish or Brabant/Limburg for some reason. The Spanish rap is excellent and got some great results with industrial metal too.

This is, at least for me, far more impressive than image generation. Once they have an API , i would just leave this running in the background to generate music while working.