Really I just wanted to check a few points on theory as I dont have a teacher who could confirm if Im on the right track or not! Please forgive any abundant ignorance and dont think Im disregarding the value of anything, I probably just dont get it. Dorian, Mixolydian, etc modes so these are essentially a set of notes derived from the key signature but with specific sharpening or flattening of notes or switching around of tones and semitones within that scale (so lets say in C, the Mixolydian would be G Mixolydian, contain all the same notes as C major but with a flattened 7th). Is that all there is to it, or am I missing something? Would you only use G Mixolydian when playing in the key of C, or is it purely that C Diatonic and G Mixolydian share the same notes except a flattened 7th, and thats as far as the relationship goes? In which case, should I learn/use them in bass world where chord tones 1,3,5 and 7 seem the most important notes to land on the strong beats, are likewise flattened, augmented or diminished dependent on the chord being used and then connected up by passing notes or whatever on the weak beats (say G7 would that be the same as G Mixolydian if you threw in a 2, 4 and 6?). I suppose Im just wondering whether I need to understand Mixolydian, Locrian, Dorian and all that stuff if Im more likely to be given a chord chart with Gm7b5, C7, etc on it, and work with chord tones and chromatic passing notes (I think I'm using the right terminology...possibly not!) Im desperately trying to learn to improvise and craft interesting basslines rather than formulaic stuff, but it sometimes feels like I could play any random array of notes and it would be some mode of a scale with an augmented this or a 13th note that. So the other, bigger question is which elements of music theory do you think are the most helpful in informing improvisation over a chord chart, for example? Thanks!