Oh oops, I could have sworn there was either a crafting recipe, or the block could be picked up afterward!In the Botania section, one of the quests asks for a cacophonium, which is fine, but it also asks for a cacophonium block. So, obviously, you make a note block and shift click with the cacophonium. However, HQM requires it to be in your inventory. I cannot figure out a single way to get it legitimately (because, upon breaking it, it just drops a note block and a cacophonium), so I had to cheat it in to complete the quest. Maybe you should just mention the cacophonium block, not actually require it for the quest.
Fixed for next version.