ˈuːli tɹˈɛpt bɪɡˈæn hɪz mjˈuːzɪkəl kɚɹˈɪɹ ɪn nˈaɪntiːnhˈʌndɹɪd sˈɪksti sˈɪks ˌɔn dˈʌbəl bˈeɪs æz ɐ fɹˈiː dʒˈæz plˈeɪɚ slˈæʃ fˈaʊndɚ mˈɛmbɚɹ ʌvðɪ ˈaɪɹiːn ʃwˈiːzɚ tɹˈiːoʊ, ɐ fɔːɹmˈeɪʃən ðæt ɹˈoʊt ˈævɐntɡˌɑːɹd hˈɪstɚɹi fɹˈæŋkfɜːt dʒˈæz fˈɛstɪvəl sˈɪksti sˈɪks slˈæʃ wˈʌn.
Uli Trepte began his musical career in 1966 on double bass as a free jazz player/founder member of the Irene Schweizer Trio, a formation that wrote avantgarde history (Frankfurt Jazz Festival 66/1.