Pedal notes played an increasingly prominent role in Takemitsu's music during this period, as in "A Flock Descends into the Pentagonal Garden". In "Dream/Window", (orchestra, 1985) a pedal D serves as anchor point, holding together statements of a striking four-note motivic gesture which recurs in various instrumental and rhythmic guises throughout. Very occasionally, fully fledged references to diatonic tonality can be found, often in harmonic allusions to early- and pre-20th-century composers—for example, "Folios" for guitar (1974), which quotes from J. S. Bach's "St Matthew Passion", and "Family Tree" for narrator and orchestra (1984), which invokes the musical language of Maurice Ravel and American popular song. (He revered the "St Matthew Passion", and would play through it on the piano before commencing a new work, as a form of "purificatory ritual".)