ˌoʊvɚ tˈaɪm, ðə fˈɔːɹmæt sˈɛɡweɪd tʊ ˈoʊnli ðə tˈɑːp tɹˈæks fɹʌmðə bˈɪɡɪst sˈɛlɪŋ ˈælbəmz, wɪð ɐ fˈɔːɹmæt nˈoʊn æz ˈælbəmˈoːɹiəntᵻd ɹˈɑːk ˌeɪˌoʊˈɑːɹ.
Over time, the format segued to only the top tracks from the biggest selling albums, with a format known as album-oriented rock (AOR).