Instrumental Duet Instrumental Duet - Level 3 - Digital Download SKU: A0.691642 By Ferrante and Teicher. By Charles Williams. Arranged by Mark Phillips. Film/TV,Standards. Score and parts. 8 pages. A. J. Cornell Publications #4820111. Published by A. J. Cornell Publications (A0.691642). (Theme from) The Apartment arranged for piano duet (one piano, four hands).