 The classical account of the analog-digital distinction is found in Nelson Goodman’s Languages of Art (1976). In fact Goodman’s account remains practically the only general account of the distinction. While David Lewis (1971) raises a series of objections to Goodman’s account, Lewis’ alternative account applies only to the representation of numbers. And while John Haugeland (1981) returns to the general distinction, he effectively qualifies and re-frames Goodman’s account in order to overcome Lewis’s and other potential objections. A few philosophers interested in clarifying the concepts employed by cognitive scientists have recognized the need for a general account of the analog-digital distinction (e.g., Dretske 1981; Blachowicz 1997; Katz 2008; Maley 2011). But in this context, as well, Goodman’s account is the essential point of reference. In some ways, this is surprising or at least striking: As Haugeland points out, the digital is a “mundane engineering notion” (1981: 217). Yet the philosophical context in which the notion receives its fullest analysis is that of aesthetics. As is well-known, Goodman’s interests in this context center on the role of musical notation in fixing the identity of musical works. But a musical notation is also a standard example of a digital system.