The new limitations are the human ones of perception.

I dare suggest that the composer would do himself and his music an immediate and eventual service by total, resolute and voluntary withdrawal from this public world to one of private performance and electronic media.

As for the future of electronic music, it seems quite obvious to me that its unique resources guarantee its use, because it has shifted the boundaries of music away from the limitations of the acoustical instrument, of the performer's coordinating capabilities, to the almost infinite limitations of the electronic instrument.