215. Up to now, we have worked with two reference points: first, the metronome speed, and second, the figure chosen among the progressions, with all its combinations. In this section, we shall deal with a third reference or calculation point: the so-called displacement, which as its very name indicates displaces us through the measure. This is one of the effects I like most, groups of 5 over 3. All of these exercises will help you in the measurement of the figures and the beat.