Hi. I posted some lessons on the major scale and the modes. I have some questions reguarding the modes, because I still dont quite understand everything about them. Now everyone always plays and teaches the major scale in the key of C (Ionian), and teaches the the modes starting from D (Dorian). I am wondering exactly "why" everyone always plays the major scale in C, and all of the modes in the certain key reguarding to the major scale degree that the mode starts on. Example, a C Ionian (The major scale) scale is CDEFGABC, and a D Dorian is DEFGABCD if you play the Major scale Ionian in the key of C. I was studying some tabs of a few different guitarists, and it seems that they always play the major scale and modes like this: C Ionian, D Dorian, E Phrygian, F Lydian, G Mixolydian, A Aeolian (minor scale), B Locrian. Why do people always play these modes, and theach these modes in these certain keys? Why couldnt they play the major scale in a different key, and the modes in a different key pertaining to which key they are playing the major scale in? Example: I'll use the A major scale: A Ionian, B Dorian, C# Phrygian, D Lydian, E Mixolydian, F# Aeolian (The Minor Scale), G# Locrian. Why do they have the rule of always playing the major scale in C and the modes pertaining to the C Major Scale? I hope someone can help me out. I have been wondering this for a while now.