It was very interesting to learn, from djealnla's source, that Vivaldi wrote some 256th notes. I never would have expected to find any in baroque music, since most instances of 128th notes occur in music of the classical era. Thinking about 256th notes brings us to thoughts of the future of music. For notes in the ordinary range of human hearing, the vibrations per second are normally well under 20,000, so it's hard to see how the frequency of exceptionally fast notes in that range could be ascertained by the listener. Like ordinarily fast notes in the bass of ordinary music, it could be hard to prevent them from sounding "muddy". But if a strain of humans were genetically engineered to be able to hear up to 100,000 vibrations per second, such people could hear fast music using such vibrations. And more elaborate chords, for that matter. There could be ultrasonic musical masterpieces just waiting to be discovered!