how to play 8000hz wav audio

[guoyuanbing]

i want to paly 8khz wav audio,but not work , for exmaple:

             var d:ByteArray=new ByteArray();

      WaveFile.writeBytesToWavFile(d,content,8000,1,16);
      d.position=0;

      var audioSource:IAudioSource=WaveFile.createSample(d);

     var s:StandardizeFilter =new StandardizeFilter(audioSource);

      player.play(s);