Unusual Sounds encapsulates the niche and fascinating subculture of library music. Genres were spliced, conventions dispensed with, and oftentimes hybrid music of astonishing complexity was produced. Elements of rock, jazz, soul, even 20th century avant-garde composition were all utilized, and no stone was left unturned in the 20 track compilation. As a result, some of the best library music defies all categorization, reflecting the individualistic quirks and artistry of the various musicians.