Pink Floyd
The original members of Pink Floyd met in an architectural college. The band started as a blues band.  Later, under Syd Barrett's leadership, they played music that was psychedelic in style.  After Barrett left the band, they started to play longer and more complicated songs, and to play at a lot of colleges and universities.  Soon, they were famous as studio musicians who loved to experiment with music.  On the album Atom Heart Mother, from 1970, they used a brass band and a choir.