Here is the sheet music for Astor Piazzolla‘s (1921-1992) “Ausencias” in a version for cello. Piazzolla composed the music for more than 40 films and this slow tango appeared as part of the soundtrack for one of his last ones: “Tango: The Exile of Gadel” released in 1986. “Ausencias” translates from spanish into english as “Absences” and we can certainly hear the gentle nostalgia in this beautiful piece.
And here below is a play-along accompaniment audio. If you download it then you will be able to change the speed with Amazing Slowdowner or other audio programs: