 An important question is whether the impact is merely causal, or whether perception in one modality is somehow constitutively tied to other modalities. If, for instance, vision merely causally impacts your auditory experience of a given sound, then processes associated with audition might be proprietary and characterizable in terms that do not appeal to other modalities. Relying on information from vision or touch could simply improve the existing capacity to perceive space, time, or spoken language auditorily. On the other hand, coordination between audition and other senses could enable a new perceptual capacity. In that case, audition might rely constitutively on another sense.