“A vocal producer—the kind that teaches pop singers to tame their sibilants and tweak their glottal stops—would not be pleased with "L'Esprit de L'Escalier", a new song by a French artist named Domenique Dumont. Not that there's anything wrong with the voice; it's sweet and perfectly in key, and it hits all its marks with a gymnast's finesse. But it's definitely not employed in the way that voices ”