Currently I'm working on a project with a multiple speaker set up in the horizontal and vertical plane. Now I want to get an as flat as possible frequency response equally spread over the speakers and room. I'm aware that it is impossible to get a perfect pink noise from every speaker at every spot in the room. But is there a way to get an approximate result? I'm not looking for the expensive intelligent room-EQ, but it should be possible to get it automated some way since it won't be static but will vary per room. Any experience?