txtCommentary1=The power of Mozart\'92s {\uldb themes}{\v 99088} and {\uldb harmonies}{\v 84040} depends directly on their interaction with {\uldb rhythm}{\v 94537}. The themes and harmonies in the new {\uldb Classical}{\v 131766} style demanded an unprecedented degree of flexibility, of which rhythm was the lynchpin. In a word, {\uldb Baroque}{\v 139635} themes maintained a uniform (usually high) level of rhythmic energy, while Classical themes {\i accumulate} rhythmic
txtCommentary2=energy. The theme that opens the {\uldb finale}{\v 82354} presents a simple example. It contains two {\uldb phrases}{\v 92038}. The first contains two {\uldb dotted rhythms}{\v 80189} that serve to hold the phrase in check. But the second phrase contains a steady torrent of fast {\uldb notes}{\v 89586} that unleash the potential energy of the first phrase.{\fs24\uldb \'80}{\v next}
