Astor Piazzolla ~ Obilivion (original version)
Ástor Pantaleón Piazzolla (March 11, 1921 — July 4, 1992) was an Argentine tango composer and bandoneón player. His oeuvre revolutionized the traditional tango into a new style termed nuevo tango, incorporating elements from jazz and classical music. A virtuoso bandoneónist, he regularly performed his own compositions with different ensembles.
There were a number of different versions, all lovely, on YouTube and it was difficult to choose just one for this post, so here are a few others.
Nadja Kossinskaja on classical guitar
Hauser on cello.
Tatiana Primak Khoury on piano.