There's this question that I wanted to ask for quite sometime. Just say Jaco composed the tune Teen Town, what does it mean? Does he just compose the bass parts? the melody? or the whole arrangement? I know that in songs with vocals, the composer normally refers to the main melody that is sung out, and the other members of the band usually take part in arranging the parts. Say the drummers will sort of compose the drum parts, the bass and guitarist and keys do their own parts.