Nope, that's another one, I believe "Innocence Unprotected" which is the only film by Makavejev I've seen so far. But the film is half documentary, though I'm not 100% sure if the film discussed was actually the first sound film from Yugoslavia.

From what I've read about it, Johann is quite right if he thinks you would remember "Sweet Movie" - must be one of the most disturbing films ever made.