It was Damrosch who had commissioned Gershwin to write his Concerto in F following the earlier success of Rhapsody in Blue (1924).
ɪt wʌz dˈæmɹɑːʃ hˌuː hæd kəmˈɪʃənd dʒˈɜːʃwɪn tə ɹˈaɪt hɪz kəntʃˈɛɹɾoʊ ɪn ˈɛf fˈɑːloʊɪŋ ðɪ ˈɜːlɪɚ səksˈɛs ʌv ɹˈæpsədi ɪn blˈuː nˈaɪntiːnhˈʌndɹɪd twˈɛnti fˈoːɹ.