 A revisionist challenge comes from those who argue that sounds are individuals rather than properties. Several arguments support this understanding. First, empirical work on auditory scene analysis suggests that one primary task of audition is to carve up the acoustic scene into distinct sounds, each of which may possess its own pitch, timbre, and loudness (Bregman 1990). Multiple distinct sounds with different audible attributes can be heard simultaneously. An analog of Jackson’s (1977, see also Clark 2000) many properties problem thus arises for audition since feature awareness alone cannot explain the bundling or grouping of audible attributes into distinct sounds. Such bundling or grouping of audible features suggests that sounds are perceptible individuals to which these features are attributed.