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]
2、注意，上面的"Sin"代表的是和弦发引器，不能写成“Cos”。
Note that the above "Sin" is cited is not written in the "Cos" chord.
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.
4、再来生成一个六秒的噪音音频：
Then generate a six second noise audio:
b = AudioGenerator["White", 6]
"White"是一个噪音生成器（"White" is a noise generator.）。
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.
6、看看三角波动：
b = AudioGenerator["Triangle", 6];
AudioPlot[b]
Spectrogram[b]
7、锯齿波是："Sawtooth"
方形波是："Square"
脉冲波是："Impulse"
8、而常用的噪音生成器，除了“White”之外，还有：
"Pink"、 "Brown"、 "Blue"。
The commonly used noise generator, in addition to the “White”, and:
"Pink"、 "Brown"、 "Blue".
