材料清单
　　P1 = 22K
　　R1 = 18K
　　R2 = 68K
　　R3 = 68K
　　R4 = 68K
　　R5 = 18K
　　R6 = 68K
　　C1 = 4.7uF-25v
　　C2 = 4.7uF-25v
　　C3 = 22pF
　　C4 = 220uF-25v
　　C5 = 220uF-25v
　　C6 = 4.7uF-25v
　　C7 = 22pF
　　C8 = 220uF-25v
　　J1 = 3.5mm STereo Jack
　　B1 = 9V Alkaline Battery
　　IC1 = NE5532-34
　　SW1 = SPST Toggle Switch