ZOFO professional piano duo by Eva_Maria Zimmermann and Keisuke Nakagoshi. The piano duet is an intimate form of chamber music, with two musicians playing individual parts on one instrument in a complex, often beautiful choreography of four hands. ZOFO , which is shorthand for 20-finger orchestra, also performs a heart pumping duet arrangement of famous orchestral pieces such as Stravinsky’s “Rite of Spring” exploring the realms in which many composers first experienced their symphonic visions.