In performances from 1974, the composer plays as he writes, simply and with great feeling; an arresting experience.
As a judge listened, the 43-year-old composer played two of his works on an electronic synthesizer.
But their composers each played a part in the century's program-music debate.
The composer, who recorded these performances at Barcelona in 1974, plays as he writes - simply and with great feeling.
True composers play on a more open field, and this can be enlightening.
Amazing producer, composer and he can play great stuff.
Or was it perhaps the expanded space that two separate keyboards allow the composer to play with?
There was a time when distinguished or soon-to-be-distinguished 20th-century composers had their major scores first played in public with ballet companies.
The composer has frequently performed the work speaking and playing simultaneously.
Italian composers have played a major role in music since the Middle Ages.