Click here if you'd like to look at a very convoluted chart about what gear will and won't work in Rock Band 4, but the gist is this: most wired Rock Band controllers will work on PS4, but not on Xbox One. Here's where things get really confusing. Oh, and remember: certain songs from individual entries that wouldn't export due to licensing issues still won't be available in Rock Band 4. If it comes, it'll be after launch - and hopefully soon, as Rock Band 3's set list was killer.

There are plans to allow players to export Rock Band 3's set list, though nothing concrete about how it will happen has been announced. Rock Band games that cannot currently be exported include: While you can currently export tracks from Rock Band (by paying a nominal fee) and Rock Band Blitz (by simply buying the game), Rock Band 2, Lego Rock Band, and Green Day Rock Band's export keys have expired, though a few of the songs from these games have been made available on the Rock Band Music Store. If you haven't imported these tracks yet, you're probably out of luck. Games that will allow you to import their songs into Rock Band include: If you've exported tracks from any of the Rock Band games that let you do so, their songs will be available to play in Rock Band 4 after launch. If support for any of these tracks comes to Rock Band 4, it'll be after launch. There's no official word on whether any of these songs will get brought back to Rock Band 4 through official means, let alone whether you'll be able to download them for free if you purchased them in the past. And since neither the PS4 or Xbox One support this framework, porting these tracks over means recharting all of them specifically for Rock Band 4 - which opens up a whole new can of licensing worms. Once Microsoft stopped supporting XNA, RBN all but shut down. XNA was a programming language created by Microsoft specifically to enable easy game creation on PC and Xbox 360.

The issue stems from the XNA framework these tracks used when RBN was active. RBN features over 2000 tracks from a wide variety of indie and major artists, from all corners of the globe - and as of launch, none of these tracks are making their way into Rock Band 4. In addition to the main offering of DLC tracks that Harmonix themselves licensed and released, there was also a massive library of independently-created and published tracks made available in the Rock Band Network.

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