ɪn ɐdˈɪʃən tə ðə θɹˈiː vˈoʊkəlˌɪsts, ðə nˈeɪtʃɚɹ ʌvðə lˈaɪn ˌʌp wʌz sˈʌmwʌt flˈuːɪd, wɪð ɐdˈɪʃənəl sˈɪŋɚz dʒˈɔɪnɪŋ ɪn æz ɹᵻkwˈaɪɚd.
In addition to the three vocalists, the nature of the line up was somewhat fluid, with additional singers joining in as required.