There is a large variety of vocalic systems in AA, and attempts to reconstruct the vocalic system of Proto-Afroasiatic vary considerably.
ðɛɹ ɪz ɐ lˈɑːɹdʒ vɚɹˈaɪəɾi ʌv voʊkˈælɪk sˈɪstəmz ɪn ˌeɪˈeɪ, ænd ɐtˈɛmpts tə ɹˌiːkənstɹˈʌkt ðə voʊkˈælɪk sˈɪstəm ʌv pɹˈoʊɾoʊˌæfɹoʊˌeɪsɪˈæɾɪk vˈɛɹi kənsˈɪdɚɹəbli.