I have gone through some threads on here about modes, looked up youtube videos and other websites and still can't figure out the answer to my question on modes. So, I apologize in advance if this question is redundant. Quick background: 1. First off, I have practiced the modes and know what they are. 2. My band just puts chords up on a whiteboard for our songs, but they're never more complex than G or F# or Am. Never is a C#7 put down. 3. If the guitar player ever plays a strange chord, he doesn't know what it is, I would have to figure it out myself. So, when we play songs, I follow the chord chart of the songs, I simply follow along with the chords, and generally play the root of the chord on the '1' and will play notes within the scale, be it major or minor. We have a song with the chord progression of G Em D Am, and I apply this logic to the song. So, I basically play in two modes, major and minor. When would you apply, say mixolydian? Would it be when I know the guitar player plays a major chord with a flatted 7th? Or is it more complex than that where you need to know the key of the song and that determines the mode you play throughout the song? I really want to get this because I have a feeling once I know this it will open up a bunch of new possibilities to my playing. Thanks so much!