kəzlˈoʊskɪz ˈʌŋkəl, vˈeɪsili fˌaɪoʊdɚɹˈoʊvɪtʃ tɹuːtˈɑːvski ɐ fˈeɪməs hˈʌslɚɹ ɪn hɪz tˈaɪm, nˈoʊɾɪsɪŋ hɪz nˈɛfjuːz mjˈuːzɪkəl ɐbˈɪləɾiz, tˈʊk hˌɪm tə stˈʌdi ɪn sənt. dʒˈɑːnz tʃˈɜːtʃ ɪn wˈɔːɹsɔː, wˌɛɹ ðə jˈʌŋ mjuːzˈɪʃən ɹᵻsˈiːvd ɐ mjˈuːzɪkəl ˌɛdʒuːkˈeɪʃən ænd ˌʌndɚwˈɛnt pɹˈæktɪs æz ɐ tʃˈæntɚ, vˈaɪəlɪnˌɪst ænd ˈɔːɹɡɐnˌɪst.
Kozłowski's uncle, Vasily Fyodorovich Trutovsky (a famous hussler in his time), noticing his nephew's musical abilities, took him to study in St. John's Church in Warsaw, where the young musician received a musical education and underwent practice as a chanter, violinist and organist.