The bass line is the part of the song you feel in your chest before you hear it in your ears. The bass line is not melody. The bass line is not rhythm. The bass line is the floor the whole song stands on. Take out the bass line and the song floats away. The bass line is gravity. The bass line is what keeps the music from flying off into space.

James Jamerson played bass on every Motown hit and nobody knew his name. He was not on the credits. He was not on the stage. He was in the basement of Hitsville USA playing a Fender Precision bass and every note he played was the reason people danced. My Girl. Ain't No Mountain High Enough. I Was Made to Love Her. James Jamerson's left hand built the foundation of American pop music and America did not know his name until he was dead.

The Ramones understood the bass line. Dee Dee Ramone played two notes and the two notes were a freight train. You did not need technique. You needed weight. The punk bass line was not about finesse. The punk bass line was about showing up. Hit the note. Hit it hard. Hit it again. The bass line is the work ethic of the song. Everybody notices the singer. Nobody notices the bass player. The bass player does not care. The bass player is too busy holding the building up.

On the corner I did not have a bass player. I had a guitar and a voice and the sidewalk. But the subway underneath me was a bass line. The rumble of the A train coming through at fifty miles an hour underneath Washington Square Park was the lowest note in the city. Every three minutes the ground shook and that shake was the bass line of New York. I played on top of it. I did not have a choice. The city was my bass player and the city never stopped playing.

Listen to the next song you hear. Ignore the melody. Ignore the vocals. Ignore the drums. Listen to the bass. That low rumble underneath everything. That is the bass line and it is doing all the work. The bass line is the song's skeleton. Everything else is clothing. You can change the clothes. You cannot change the skeleton. The bass line is what the song is actually about. Everything on top is what the song pretends to be about.