They won't find a copy of it in a computer either. This seems to frame things in a way that overlooks the difference between an object and the schematics by which it can be reproduced. For single-musician compositions, there certainly is a set of information decodable to create a performance of those compositions. This requires a more expansive definition of information, perhaps, and a larger system. Computers can't reproduce music if they're not connected to speakers, for example, and a musician can't reproduce a piano composition without a piano.