« Since Ursula Oppens expressed the strong desire to participate creatively [in this Disc Richard Teitelbaum Piano Plus – Piano Music 1963-1998, New World Records, n. 80756-2], I conceived the work as a kind of “toolkit” for real-time interactive composition. It consists of hardware (two Disklaviers and a MAC laptop), interactive real-time software (the Marx Brothers 4.0 patch program written in MAX), and notated music. The compositional attitude roots itself in the tradition of Earle Brown, John Cage, and David Tudor. Brown’s pioneering “open form” pieces of the early ’50s (Folio, December 1952) and Cage’s works, like Variations II and Cartridge Music, provided material for the performer (usually Tudor) to construct and perform the piece, thus requiring him to complete the compositional process and thereby collaborate in the compositional act. Mastering this challenge inspired Tudor to try his hand at composing music of his own, and in so doing, he has left us an extraordinary legacy of work and new compositional concepts, creating an extended instrument system, and regarding the total configuration as the composition ».
[“Composer’s Notes”, Livret du CD Richard Teitelbaum Piano Plus – Piano Music 1963-1998, New World Records, n. 80756-2; https://nwr-site-liner-notes.s3.amazonaws.com/80756.pdf]