What three chords does McCartney generally make use of ?
A given style typically pays attention to how its musical structure approaches dissonance ( in steps is less jarring , a leap is more jarring ) , and even more to how they resolve ( almost always by step ) , to how they fit within the meter and rhythm ( dissonances on strong beats are more emphatic , those on weake beats less vital ) , and to how they lie within the phrase ( dissonances tend to resolve at phrase 's end ) .