I spent a fair amount of my time this evening leading up to prime time TV watching the remaining special features on the ALVIN Blu-ray. A couple of the features were tongue-in-cheek featurettes where the human actors are pretending the chipmunks were there and they're giving interviews about their egos, etc. I found those tiresome. The features geared to show a little of the work behind the magic were interesting but might have been shown in greater detail.
Since the disc was past street date, the BD-Live stuff was active, but it was only a trailer and a couple of deleted scenes. Of course, there were also contents there for a host of current or upcoming film and Blu-ray releases, too. THE SOUND OF MUSIC is one of those.