Astor Piazzolla - Oblivion

Oblivion sheet music is online on my website. It’s a beautiful piece by Astor Piazzolla, brings some sad memories too - I first heard it from a friend of mine, who died very young. I also played it for my final exam in Germany in the memory of this friend. Of course, then I played it with more instruments, the way it should be. If any piano transcription of this thing already exists, I’m not aware of it. (Probably there should be, it’s a very famous tango). Also I don’t have the origin