Edson Tadeu Ortolan wrote: >The tonalities of the century 17 to middles of the 18 were little: >until four sharps (E Major) and four flats (A b Major). Theoretical >controversies, construction difficulty and tuning of the instruments, >and temper were the problems. Only J.S. Bach and J.Ph. Rameau ("Traite >de l'harmonie" - 1722) advanced more. Hear: > >J.S. Bach: The Well-Tempered Clavier (18th century) >F. Chopin: 24 Preludes (19th century) If we're going w/ Chopin into the 19th century, there's also Brahms' Trio No. 1, Op. 8. wm