Durations shorter than the 64th are rare but not unknown. 128th notes are used by Mozart and Beethoven; 256th occur in works by Vivaldi, Mozart and Beethoven.An extreme case is the Toccata Grande Cromatica by rarly-19th-century American composer Anthony Philip Heinrich,which usesnote values as short as 2048ths; however, the context shows clearly that these notes have one beam more than intended, so they should really be 1024th notes.