Ofterdingen and Kropotkin

The time-music of the quasars. A huge volume of radio signals reaches this planet from space, crossing gigantic distances from the far side of the universe. It's hard to accept that these messages are meaningless, as they presumably are [...] Yet the hope remains that one day we will decode them, and find, not some intergalactic fax service, but a spontaneously generated choral music, a naive electro-magnetic architecture [...]
J.G. Ballard, The Atrocity Exhibition, 36