A series cam also be used backwards, or upside down (inverted or bot his device had been around for centuries: Bach and earlier composers often used it.) Schoenberg said this was like lookin at a hat from different angles: Whether you see it from the fre or sideways or upside-down, you always recognize it as a hat. This may have been one of Schoenberg's jokes, but there's something in it. Schoenberg composed his first piece to be bas entirely on a note-row in July 1921: the Prelude of his Suite f Piano (1920-23) MERE Ne, A LITTLE GOES A LONG WAY