Sergei Rachmaninoff’s Symphonic Dances, written in America but drenched in dreams of Mother Russia, is a work of rare sonorities (the instrumentation even includes a part for alto saxophone). Yet in tandem with the orchestral version, Rachmaninoff produced a two-piano version, which he introduced together with Vladimir Horowitz at a private party in Beverly Hills in 1942. If ever there were pianists who could conjure up whole symphony orchestras, Rachmaninoff and Horowitz lead the pack. Now the Israeli-American pianist Inon Barnatan sets out to go them one better, performing the Symphonic Dances in his own transcription for a single keyboard. To raise the stakes just a little more, he has programmed excerpts from Stravinsky’s Firebird in the staggering transcription of Guido Agosti, a disciple of Ferruccio Busoni, another Dumbledore of the keyboard. —Matthew Gurewitsch