Adult album alternative is a radio format. A spinoff from the album-oriented rock format, its roots trace to the 1960s and 1970s from the earlier freeform and progressive formats.FormatThe format has a broader, more diverse playlist than most other formats. Musical selection tends to be on the fringe of mainstream pop and rock as well as many other music genres such as indie rock, pop rock, alternative rock, alternative country, jazz, folk, world music and blues. The musical selections tend to avoid hard rock and rap music. Some Triple-A stations bill themselves under slogans such as "World Class Rock" or "Quality Rock". Music selection also includes tracks from albums that are not singles, which leads to the enhanced and larger playlist. Some AAA outlets focus more on classic rock artists, folk and blues while others focus on more contemporary artists & modern/indie rock.