Sometimes a work that a composer doesn’t regard as especially important becomes a beloved favorite in later centuries. Ave Verum Corpus, written as a favor for a friend, is a good example. The motet (in Mozart’s time typically a polyphonic choral composition on a Latin text) celebrated the feast of Corpus Christi—and why the text refers to the “true body” (verum corpus). It became part of the repertoire of the Sistine Chapel Choir. Perhaps that is why Liszt, writing later in life from a Roman monastery, transformed the masterpiece into an exquisite piano solo, Evocation à la Chapelle Sixtine. Playing quietly and serenely can be more challenging than playing with dash and power. Here is a chance to evoke inner and outer peace by playing smoothly and—following the advice of David Andruss—pedaling with special care. Can you hear the choir?