Face the music= aceptar las consecuencias

The expression probably has military origins. When soldiers were dismissed from the army for some misdemeanour or other, it was standard practice for an official ceremony to accompany their departure. The unfortunate victim would depart from the camp or barracks by enduring a ‘walk of shame’ past the ranks of his fellow soldiers. The ‘walk of shame’ was usually accompanied by the beat of a drum, hence the association of music with the idea of accepting one’s punishment.