joey's talent may be undeniable, but marsalis says no one can explain where it comes from. >> marsalisavis about sound. "man, how you get the sound you get?" he said, "man, nobody know about sound. sound just is." and i think that about his... his abilities. they are. >> cooper: they just are. >> marsalis: they are. >> cooper: it's not just how he plays that sets him apart, it's where he's from-- bali, a tiny indonesian island better known for palm trees than piano players. he was a hyperactive kid, so one day, when joey was six, his parents, denny and fara, brought home a keyboard, hoping to channel all that restless energy. you thought that maybe that would focus him. >> denny silas: yeah. yeah. at the same time, we wanted to find out whether he's musical or not, because we have a musical family. >> cooper: and that was the first time he started playing with the keyboard. >> denny silas: yeah. ♪ ♪ >> cooper: here he is one year later at age seven. remember, no one taught joey how to play like this. he just picked it up listening to his dad's albums of duke ellington, charlie parker,