 Timpani come in a variety of sizes from about in diameter down to "piccoli timpani" of or less.A 33-inch drum can produce C2 (the C below the bass clef), and specialty piccoli timpani can play up into the treble clef.In Darius Milhaud's 1923 ballet score "La création du monde", the timpanist must play F4 (at the bottom of the treble clef).