I've known this remix by Koop on a Astor Piazzola piece called "Vuelvo al Sur" but never had listened to the original, and researched the composer until now. I'm moved by the deeply profound melody. It had my curiousity, now it has my attention. If anyone has other recommendations from Piazzola they are welcome.
vocal version : https://www.youtube.com/watch?v=9zOs1vpYSDQ