然后直接在放代码即可.

//声明
var jzdz:URLRequest=new URLRequest("http://59.52.188.151/s2.mp3");
var sywj:Sound=new Sound;
var sykz:SoundChannel=new SoundChannel;
var liu:SoundLoaderContext=new SoundLoaderContext(100000,true);
var ztwz:Number;
//初始化
hk_mc.buttonMode=true;
jd_mc.visible=false;
sywj.load(jzdz,liu);
sykz=sywj.play();
//加载过程
sywj.addEventListener(Event.OPEN,kshs);
sywj.addEventListener(ProgressEvent.PROGRESS,jzhs);
sywj.addEventListener(Event.COMPLETE,wchs);
sywj.addEventListener(IOErrorEvent.IO_ERROR,cchs);
function kshs(event) {
}
function jzhs(event) {
 var jzjd:Number=int((event.bytesLoaded/event.bytesTotal)*100);
 jd_txt.text="已加载:"+jzjd+"%";
 jd_mc.gotoAndStop(jzjd);
 jd_mc.visible=true;
}
function wchs(event) {
 jd_txt.text="加载已完成";
 jd_mc.visible=false;
}
function cchs(event) {
 jd_txt.text="加载出错了";
}
//声音控制
tz_btn.addEventListener(MouseEvent.CLICK,tzhs);
bf_btn.addEventListener(MouseEvent.CLICK,bfhs);
zt_btn.addEventListener(MouseEvent.CLICK,zths);
function tzhs(event:MouseEvent) {
 ztwz=0;
 sykz.stop();
}
function bfhs(event:MouseEvent) {
 sykz.stop();
 sykz=sywj.play(ztwz);
}
function zths(event:MouseEvent) {
 ztwz=sykz.position;
 sykz.stop();
}
//控制条
var shang=hk_mc.y;
var zuo=hd_mc.x-2;
var xia=0;
var you=hd_mc.width-hk_mc.width+2;
var fk:Rectangle=new Rectangle(zuo,shang,you,xia);
var zcd;
var bfb;
var pd:Boolean=false;
hk_mc.addEventListener(MouseEvent.MOUSE_DOWN,axhk);
hk_mc.addEventListener(MouseEvent.MOUSE_UP,skhk);
stage.addEventListener(MouseEvent.MOUSE_UP,lkhk);
stage.addEventListener(Event.ENTER_FRAME,cfzx);
function axhk(event) {
 pd=true;
 hk_mc.startDrag(false,fk);
 sykz.stop();
}
function skhk(event) {
 pd=false;
 hk_mc.stopDrag();
 sykz=sywj.play(ztwz);
}
function lkhk(event) {
 pd=false;
 hk_mc.stopDrag();
 sykz.stop();
 sykz=sywj.play(ztwz);
}
function cfzx(event) {
 zcd=sywj.length/(sywj.bytesLoaded/sywj.bytesTotal);
 bfb=sykz.position/zcd;
 if (pd) {
  ztwz=zcd*(hk_mc.x-hd_mc.x)/(hd_mc.width-hk_mc.width);
 } else {
  if (zcd) {
   hk_mc.x=bfb*(hd_mc.width-hk_mc.width)+hd_mc.x-2;
  } else {
   hk_mc.x=hd_mc.x;
  }
 }
}
//滑道
hd_mc.buttonMode=true;
hd_mc.addEventListener(MouseEvent.MOUSE_DOWN,axhd);
hd_mc.addEventListener(MouseEvent.MOUSE_UP,skhd);
function axhd(event) {
 pd=true;
 sykz.stop();
 if (mouseX<(hd_mc.width-hk_mc.width)+hd_mc.x) {
  hk_mc.x=mouseX-hk_mc.width/2;
 } else {
  hk_mc.x=(hd_mc.width-hk_mc.width)+hd_mc.x;
 }
 ztwz=zcd*(hk_mc.x-hd_mc.x)/(hd_mc.width-hk_mc.width);
}
function skhd(event) {
 pd=false;
 sykz.stop();
 sykz=sywj.play(ztwz);
}