Fig. 9From: From raw audio to a seamless mix: creating an automated DJ system for Drum and BassIllustration of the circle of fifths and allowed key changes in the DJ system. For example, if the key of the current song is C major (light gray), the allowed key changes are one perfect fifth up (G major, the dominant key), one perfect fifth down (F major, the subdominant key) or changing to the relative key (A minor)Back to article page