As I have said before, I've played bass several years but I have severe flaws in theory, because I'm 95% self-taught. So I have a couple of questions about minor scale(s) : 1) The song/chord is minor, so , as a bassist, I am supposed to play a minor scale. Ok, but which one : melodic, harmonic, another-"ian"-ending-mode-that-I-don't-know ? How do I find out (without my not-so-good-ears) ? I mainly use pentatonic in this case because it's easy and avoids me asking myself this very question. But I would like to use the fullest harmony available. 2) The melodic minor is different when descending it or ascending it. Ok, I get that. But you are not always really descending or ascending a scale, are you ? Most of the time I'm "moving" in the scale (I don't know how to express that correctly. Is it clear ?). How do you know you got to pick the ascending or descending notes ?