Karlheinz Stockhausen said this quote

Since I started composing I have always worked with series of tempos, even superimposed the music of different groups of musicians, of singers, instrumentalists who play and sing in different tempos simultaneously and then meet every now and then in the same tempo.

~ Karlheinz Stockhausen

And when they encounter works of art which show that using new media can lead to new experiences and to new consciousness, and expand our senses, our perception, our intelligence, our sensibility, then they will become interested in this music.

~ Karlheinz Stockhausen