 However, the perceptual concern for a common subject matter could be reflected as such in certain forms of auditory experience. For instance, the commonality may be experientially evident in jointly perceiving shared spatio-temporal features, or in the perceptual experience of audio-visual intermodal feature binding. If so, some forms of auditory perceptual experience may share with vision a common multimodal or amodal content or character (see O’Callaghan 2008b, Clark 2011). More to the point, if coordination with another sense enables a new auditory capacity, then vision or touch could have a constitutive rather than merely causal impact upon corresponding auditory experiences.