"Few people are spared the occasional experience of being gripped by the obstinate unfolding of an imagined line of music. Although the sound might not exist at the present moment in the real world, or be audible to anyone else, it can seem compellingly, maddeningly real. An episode of this sort often seems more like the reliving of a tune than the simple remembering of it."
Read MoreAdapted from Chapter 4 of Elizabeth Hellmuth Margulis' On Repeat: How Music Plays the Mind.