Torch party

Since mobile phones are in everyone pockets, they've also been used as torch in concerts & parties...
so what if these torches react to noise level of the environment & dim or light up with the noise level?
The result of something like this will be a huge graphic equalizer made by people's smartphones together...

What this app will do exactly?
It's a super simple app which will dim or light up your phone screen brightness and flashlight brightness together with environment noise level.