The vertical stripes show the rhythmic “grid” — showing the hierarchy of beats. The first beat in a measure is the strongest, followed by the half-measure point, followed by quarter-measure points, etc. This lets you see when a note is “suspended” through a strong beat.
Filed under: Music Tagged: Bach, BWV 790, Friday . . . → Read More: Dead Wild Roses: The DWR Friday Classical Music Interlude – Bach, Three-part Invention #4, D minor (Sinfonia), BWV 790