单项选择题
A.频率调制声音 B.波表声音 C.波形声音 D.MIDI音乐
A.(9,30,60,20,16,18,50,80) B.(9,50,80,30,60,20,16,18) C.(9,16,18,50,80,30,60,20) D.(9,18,16,20,50,80,30,60)
A.34.82 B.42.86 C.85.71 D.87.77