I doubt they're talking about a new encoding format or anything like that. If I had to guess, I would be thinking more about something like the recentish NiN a

I doubt they're talking about a new encoding format or anything like that. If I had to guess, I would be thinking more about something like the recentish NiN album that came with Garageband files so that you could remix the music yourself. Or which provides synchronised lyrics embedded in the music, or something like that.