 Mystic Records has been credited with several innovations in the independent record industry of the 1980s.It introduced Super Sevens (7-inch 33rpm extended play records featuring seven songs) and helped popularize the manufacture of limited edition records on colored vinyl.The label was also influential through its release of multi-band compilation albums, such as its "The Sound of Hollywood" series, and promotional label samplers making use of album tracks, typified by its "Mystic Sampler" series.