waveform.nchannels=1; //声道设为1
waveform.nsamplespersec=11025; //采样率11025
waveform.navgbytespersec=11025;
waveform.nblockalign=1;
waveform.wbitspersample=8; //数据位设为8位
waveform.cbsize=0;
pwavehdr pwavehdr1,pwavehdr2; //wave波形的头信息
