Between the two poles of rhythmic impulses on one hand and harmonic surfaces on the other, we look for the many nuances that cannot be clearly assigned to either side. The shades of grey between black and white are also often overlooked in the search for freedom and equality between the sexes. We demonstrate this musically where the harmonic principle is still subordinated to one of the beats. You are cordially invited to this extraordinary musical dispute, which mediates between the genres and formulates new questions.