By his middle years as a composer (often dubbed his "Heroic Period"),
Ludwig van Beethoven (1770-1827) had found his own voice to the extent
that he was no longer considered a mere extension of Mozart and Haydn.
In 1808 he produced two groundbreaking symphonies (the Fifth and
Sixth), as well as a set of piano trios (Op. 70), that represent a
return to the intimacy of chamber music that Beethoven had set aside
for grander forms. Of the Piano Trio in E-Flat Major, Op. 70, No. 2,