Rock Band 3 [BLUS30463]

Since nobody seems to have mentioned it and people don't seem to be aware of it, you don't need to use external programs to bind every single cymbal to also hit R3. When you hit a cymbal it actually presses another button (the cymbal modifier), you just need to map that button to R3. You'll need to manually map it by opening the input config in a text editor as RPCS3's input mapping will always prioritize mapping the button that corresponds to the cymbal's color. The drum pads have a modifier as well, just like the cymbals, which is L3. You need to map this for drum pad navigation to work.