Just recently got my MIDI-Pro Adapter, but it doesn't work in GH: Metallica, GH:5, GH: World Tour. I was thinking of buying GH: Warriors of Rock, but the GH wireless MIDI adapter that came with the Band Hero drums is appalling — it drops notes all the time, whereas the MIDI-Pro in Rock Band 3 seems flawless.
I e-mailed Activision support and they said they didn't know. So, does it work in Warriors of Rock? I can only guess that the answer is "No", but I would like somebody to verify it either way so I can purchase the game (or not).
Best Answer
I finally got around to trying this (picked up GH:WoR with the Guitar in a half price sale) and I can confirm it definitely does not work. The game picks up the MIDI controller only if the switch is set to D for drums, but then all attempts to start the game indicate that you're using a standard PS3 controller and the game asks you to plug in a microphone.
With Activision's announcement to drop GH games I don't think we'll see a patch any time soon, either.