Tulum is an asian(blacksea) ethnical instrument which has similarities with Bagpipe.
Its sound is more dramatic then BagPipe.
It is a harmonic instrument. It can sound 2 notes simultanously.
It is the most different wind instrument in the world.
With this app you can play realistic Tulum.
You can watch it in the video :
http://www.youtube.com/watch?v=3v-ulNh009s