Introduction - If you have any usage issues, please Google them yourself
Using field-programmable logic device (FPGA) production, the use of EDA software verilog HDL hardware description language control to control, and programming implementation. Buttons 7 to 1, respectively, for the seven notes pronunciation (DO, RE, MI, FA , SO, LA, SI), while LED lights up. 8 and 9 buttons for controlling music playback, you can choose three song playback.