Mnozil Brass knew it all the time: The difference between the “Duidu” of the Fledermaus waltz and our very own “doo-be-doo” is almost non-existent. They have been toing and froing between Strauss and Sinatra for 30 years, and as they see it. Strauss blurred the distinction between e and u, his waltzes made him the idol of the masses - and filthy rich on top. In Strau$$, Mnozil Brass spill the beans about Strauss. Right down to the last $.