Methods and structures for providing a simulated rock speaker cabinet are disclosed herein. The required composition of solution of ethyl alcohol, water and sugar syrup is prepared. In combination with the strumming apparatus, the present invention includes an instrument body with recessed components on the front surface of the instrument body. Carriers may be used to serve as supports during the manufacturing process, whereby deformations can be prevented in the board. A pattern generator generates expect data signals in this manner, and may be utilized in a variety of integrated circuits, such as an SLDRAM.