Description:
This is an unvocalised scratch sound that can be slipped between fast electro style beats.
Method
1. The simplest way to describe this is to say chowi.
2. To make it more scratch-like fade in the ch part so it sounds more like schowi or tschowi.
3. The more advanced version will be a triplet saying tschowichi tscho - wi - chi.
For more tutorials visit http://www.humanbeatbox.com/learn