Rehearsal: Cristian Măcelaru conducts Anna Clyne, Elgar, Debussy, and Enescu featuring Yo-Yo Ma, cello

Taking its cue from the “Proms” idea of the commission, her five-minute, single-movement Masquerade combines the imagery of a festival, multilayered outdoor activity with familiar musical ideas smeared and reconfigured into new ways of sounding.

Unlike the traditional three-movement concerto, it has four movements, not for length and weight but for diversity and contrast.

Part symphony and part tone poem, Debussy’s innovative La Mer is one of the most influential pieces of the 20th century and has been as an audience favorite for more than a hundred years. La Mer was premiered in 1905 and the BSO gave the American premiere in March 1907.

Written in 1901 when he was not even 20 years old, the first Romanian Rhapsody became Enescu’s signature work.