Chapter 21 is huge. Huge, in the sense of long and in-depth. It has several download links, a You tube video, screenshots and audio examples as we dive in especially Reggae percussion. It's a chapter where the function of the hand drum and other percussion instruments are explained while principals are revealed as well. We're also adding a final touch to the music by taking a look at the clavinet and the pucking guitar. This is a chapter for the serious scholar, not for ones seeking to click their own supermix in a quarter of an hour.