Draper co-wrote the song "Calling Occupants of Interplanetary Craft", which was not only successful with his band Klaatu, but also became a Top-40 hit for the Carpenters when they covered it in 1977.
dɹˈeɪpɚ kˈoʊɹˈoʊt ðə sˈɔŋ "kˈɔːlɪŋ ˈɑːkjʊpənts ʌv ˌɪntɚplˈænɪtˌɛɹi kɹˈæft", wˌɪtʃ wʌz nˌɑːt ˈoʊnli səksˈɛsfəl wɪð hɪz bˈænd klˈɑːɾuː, bˌʌt ˈɔːlsoʊ bɪkˌeɪm ɐ tˈɑːp fˈoːɹɾi hˈɪt fɚðə kˈɑːɹpəntɚz wɛn ðeɪ kˈʌvɚd ɪɾ ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti sˈɛvən.