Yes it can be done. I don't know if this is well known or not. But I bet there are a few people that don't know this trick.
What you do is you choose pro drums. If you don't have any cymbals selected the game will prompt you to pick one. SO pick one so the game can load the pro drum track. Then as soon as the song loads pause the game, and go to drum options, remove all the cymbals, then restart the song so the game can load the track without cymbals. Then just play the song and get your unlocks.