This is an update on the code I wrote to talk to the original version of the Sony Network Walkman devices; it's intended to provide a common API to talk to both old- and new-style scrambling methods. As it stands, it's pretty rough: a lot of what should be common code is living in the MPLE v1 codepath, and the MPLE v2 codepath isn't even anywhere close to working not least because I have neither a v2 device nor a full breakdown of how the whole thing works.