Pythagoras and musical intervals. Pan pipes. Portable organs.
Monochords with keys. Guido d'Arezzo. Clavier type. Virginal in
Elizabethan age. Early clavier masters. First woman court clavier
player. Scarlatti and Bach. True art of clavier-playing. Sonata
form. Where Haydn gained much. Mozart and Clementi. Pianoforte and
improvements. Viennese school. Clementi school. Giant on lofty
heights. Oscar Bie on Beethoven. Golden age of pianoforte. Piano
composers and virtuosi, from Weber to the present time. Teachers and
performers often corrupters of music.