I introduce Mixolydian scale used on a seventh chord. A semitone is they withdraw, and to become m7th, and M 7th of the major scale becomes near to the constitution sound of the seventh chord, and the use on the seventh chord and affinity improve so good.
how to use?
It is often used in the music of the seventh chord frequent appearance that came from the blues. I made a C7 blow thing music example.
The charm that is a negative funky in some way is a certain scale. Please use it on a seventh chord significantly.