由4X4组成16个按钮矩阵，设计成16个音,可随意弹奏想要表达的音乐。 -Composed of 16 buttons by the 4X4 matrix, designed to tone 16, are free to play the music you want to express.

Acquisition and Processing of the speech signal, digital signal processing class-based, University of numerical analysis algorithms, The final weight matrix is ??the filter coefficient.

Decoupling, restore the original signal, The final weight matrix is ??the filter coefficient, Add noise processing.