All branches of Afroasiatic have a limited number of underlying vowels (between two and seven), but the number of phonetic vowels can be much larger.
ˈɔːl bɹˈæntʃᵻz ʌv ˌæfɹoʊˌeɪsɪˈæɾɪk hæv ɐ lˈɪmɪɾᵻd nˈʌmbɚɹ ʌv ˌʌndɚlˈaɪɪŋ vˈaʊəlz bᵻtwˌiːn tˈuː ænd sˈɛvən, bˌʌt ðə nˈʌmbɚɹ ʌv fənˈɛɾɪk vˈaʊəlz kæn biː mˈʌtʃ lˈɑːɹdʒɚ.