Proecssing引用Minim 库

Proecssing引用Minim 库中的 AudioInput 读取麦克风 进行语音交互

运行后无法打开，报错显示NullPointerException

求大神帮忙解决，感恩～

import ddf.minim.*;
import ddf.minim.analysis.*;
import ddf.minim.effects.*;
import ddf.minim.signals.*;
import ddf.minim.spi.*;
import ddf.minim.ugens.*;

Minim minim;

AudioInput microphone;

void setip()
{
  size(500,500);

  minim = new Minim ( this );

  microphone = minim.getLineIn();
}

void draw ()
{
  float backgroundcol = microphone.mix.level()*255*20;

  background(backgroundcol,backgroundcol,backgroundcol);
}

void setup 你写成了 void setip.......