The kick drum and the bass guitar are fundamental. I mean, like, fundamental! They represent the bedrock of musical expression, the foundation upon which the house of music is built. This has always been so. The low-frequency impulse and chordal foundation of music is common to virtually all music from all over the world and throughout history. And today’s high-powered, high-tech, industrial-strength rock and roll is no exception. The kick and bass are such an important part of our music that we must give them very special care, especially in recording. As musicians, producers, recording engineers and mix engineers, we absolutely have to fully understand the capabilities and musical significance of these two instruments, both independently and together. They are the primary tools we use to create music which communicates the emotions that live in the pulse, the groove, the chord changes, and the riffs of rock and roll music.