As a member of ASCAP and the Screen Composers Association of the U.S., he interpreted for visiting musicians in Los Angeles. Kremenliev met many distinguished composers, including Pierre Boulez, Elliot Carter, Carlos Chavez, Aaron Copland, Luigi Dallapiccola, Roy Harris, Ulysses Kay, Ernst Krenek, Luigi Nono, Harry Partch, Arnold Schoenberg, Dmitri Shostakovitch, William Grant Still, Karlheinz Stockhausen, Igor Stravinsky, Toch, Vaughan Williams and William Walton.
