If I'm playing a C major scale and I play a C major scale on top of that chord, you hear it as C major or if you want to call it one of the modes, it's called C Ionian.
If I play a D minor chord and I play the same scale, it's not going to sound major anymore. It completely changes the sound and you can do that for each mode. Each mode has its own chord.
Maybe what I'd like to do is to show you what chords match each mode. Let's start again with
Ionian in the key of C. If I play a C major scale that we consider that the Ionian mode that matches the C major chord. D Dorian matches the D minor chord. E Phrygian matches the E minor chord. F Lydian matches the F major chord. G Mixolydian matches the G major chord. A Aeolian matches the A minor chord.
And then lastly, B diminished, which is maybe a chord a lot of you don't know, The fingering I'm playing for a B diminished chord right here is E with my second finger on the fifth string and F with my third finger on the fourth string and then finally a D with my fourth finger. And
I'm just playing those three notes. Those notes spell out a B diminished chord and the scale that matches that B diminished chord is B Locrian. And there you have the modes. One thing that I want to add about the modes is, since there's seven notes in a major scale, there's gonna be seven