Is there sufficient information in this to identify individual machines? E.g., consider a family acquiring notebooks of the same type for each family member and

Is there sufficient information in this to identify individual machines? E.g., consider a family acquiring notebooks of the same type for each family member and operating them over the same LAN (outward IP address). There may be differences depending on components picked from a supply pool, but in general, there isn't much variety in a specific make and model running on the same OS revision (and the same generation of drivers, according to automatic updates). Further, is there sufficient isolation in the audio stack so that fingerprints are independent of the software currently running on the machine? (Another comment regarding DACs and insufficient isolation from the north bridge and induced harmonics indicates otherwise.) I guess, while this may provide some indications, on its own, it provides insufficient information for identification of a specific hardware device. (Edit: Which is, of course, bad enough.)