Hi guys, I'm a bit puzzled. Maybe I'm missing something here. I'm practicing my walking bass lines. In my walking bass book I have being playing along to "Autumn Leaves" in the key of Bb. No problem here as the chords are Cm, F7, and Bb i.e. II V I. However, when I go to You Tube and select some play alongs, the II V I does not corrospond with the key. For example, one is in Gm and it starts with C. Likewise another in Em it starts in A. Should Gm not with A, and Em with F# ? I know I am going to feel silly, when I hear the answer, but it has me puzzled at present.