I'm a student in my highschool band, and one of our activities is to march in our town's Christmas Parade every year. Usually, some of the students hook up portable, battery-powered Christmas lights to their instruments during the parade. I want to take this tradition one step further, by having the lights change based on what notes I'm playing.
I have a small bluetooth headset that I can hook to the bell of my instrument to feed the audio into my android phone, where an app I can program will interpret the audio and somehow control the lights(that's where I get stuck). I need to find a way to use my phone to control whether the lights are on or off.
What hardware will I need in order to realize this? I'm a bit of a newb to the Arduino scene, but I'll be willing to learn. Thanks for the help.