@BobbyColePopMusic It was with lyrics. Holvay and Beisber wrote them. Joe Zawinul (then with Cannonball) wrote the music and recorded it as an instrumental.
@popegeorgeringo Bass players often sing along. Perhaps to keep time. You could often hear Jaco when you were out in the audience, although I don't think anyone ever gave him a mike.
@davehutchinson67 It's a tele