if your like me, then there nothing more annoying than 2 music bricks too loud for one area (i think i said that wrong..)
anyways, why not ajust the range of music so that one bricks range could be larger or smaller, also, while using the tool, you can see the range of music represented by a colored sphere so the sphere would grow larger/smaller if you ajust the range
its a "meh" idea ._.