Mainstream rock
Mainstream rock (also known as heritage rock) is a radio format used by many commercial radio stations in the United States and Canada. == Format background == Mainstream rock stations represent a cross between classic rock, active rock and alternative rock on the programming spectrum, in that they play more classic rock songs from the 1970s and 1980s and fewer songs from emerging acts than active rock and alternative rock stations, and only rarely play songs on the softer edge of the classic rock format or the harder edge of the active rock format.