I've only been a member a few months now, so if this question has been asked before, feel free to lock this thread and hopefully point me in the right direction. Okay, my question. I've seen progressions as follows: [Key of F major] F7..Bb7..F7..Cmin7..F7. Okay, when I see this when the progression is in the key of F major, I see the I, the IV, and then the V is minor tonality. But my question is...why is the C minor in this case? Are you not out of the key? Or maybe I've answered my own question in that the key isn't in F major but in Bb7, meaning the C is the ii? I got this progression from here http://www.talkbass.com/forum/showthread.php?t=125536 (sorry don't understand how to link). I think I'm wrong in assuming the key was Fmajor when in fact the key is actually Bb7? Any thoughts? Do I have my theory right? Don't blast me, cuz I'm dumb Thanks for any replies.