1、生成长度为6秒钟的和弦音频：Generates chord sounds with lengths of 6 seconds:AudioGenerator["Sin",6]
3、查看和弦音频的波形和频谱图。看到了吗，没有噪音，或者噪音很少。See the chord audio waveform and spectrogram.You see, there is no noise, or little noise.
5、那么这段纯粹的噪音是什么形状呢？嗯……漫漫的全是声音，一点空隙都没有。So what's the shape of this pure noise?Wow...... It's full of noise, not even a little space.
7、锯齿波是："Sawtooth"方形波是："Square"脉冲波是："Impulse"
