Samuel Adler’s IMPROVISATION AND WALTZ delights performers and listeners by treating traditional genres in non-traditional ways. The familiar waltz rhythm is offset by carefully inserted bars of two, toying with expectations while retaining the dance’s underlying character. In the very free “improvisation” sections, Adler takes full advantage of the organ’s scope, creating broad swaths of slowly shifting harmony beneath the flute’s languid, searching lines. For advanced performers.