Last week the Jewish music world lost one if its pioneers, Eli Lipsker.
Having played countless weddings and simchas, he likely played the weddings of dozens of ddf members' parents. He was one of the earlier proponents of kids choirs and recording Jewish music. He taught music to hundreds of children, and was the "house musician" in 770.
His books teach people to play Chabad niggunim, his recordings teach nusach, and most Chabad children grew up with his Pesach tape.
Here is Avraham Fried discussing his start in Eli Lipsker's choirs:
And here is the song mentioned in that clip, Tzomo: