The II V I Chord sequence is the most commonly used sequence in both jazz and many other styles of music. Mostly used from the Major Key it is the 2nd 5th & 1st chords in sequence. It is used so much simply because we like the sound it makes and it occurs at the beginning of sections of music, at the end and in the middle. So we need to know as many ways to use it as possible and this course will help you start.