Description
Some beatboxers have really mastered this technique that enables you to scratch and beatbox at the same time.
Method
1. To make this sound your top lip should overhang your bottom lip. Dukebox describes it as having 'granny lip' - imagine you have no teef!
2. With your tongue placed in the gap between your lips (without touching) you should be able to breathe out channeling air under your tongue to make a whistly airy noise.
3. You can change the shape of the whistle by moving your lower lip to expose your front lower teeth and gum.
For more tutorials visit http://www.humanbeatbox.com/learn
