I competely admit I'm way too ignorant about the music, but I'm trying to rectify that. I'm looking for the name of a waltz which I really love. It is famous enough, I think. At least I hear it with regularity, but not inevitability, in milongas here. The main identifying aspect that I can describe is that it is sung by what I think are a man and woman in duet, with the the woman also singing parts of the of verses on her own. It about medium speed and has a major and a minor part. One DJ here seems to often put it in a tanda with Desde el Alma, but I don't know if that it is anything to go by. Might just be his choice. I know it's vague, but on the other hand it isn't obscure, so if anyone can think of a few candidates to at least narrow it down a bit, as I'm going mad just trawling youtube for each and every waltz. Thanks.