add pause in this code....help!!!!

hi everybody!!!

i'm writing code for up and down speed of song....

for play of song i write this code:

public function playMC(evt:MouseEvent😞void
        {
            target= new ByteArray();
            var url:URLRequest = new URLRequest("C://song.mp3");
            mp3Start = new Sound();
            mp3Start.addEventListener(Event.COMPLETE, complete);
            mp3Start.load(url);


            position = 0.0;
            rate = 1.0;
            sound = new Sound();
            sound.addEventListener(SampleDataEvent.SAMPLE_DATA, sampleData);
           
        }
public function complete(event:Event😞void
        {
            channel = sound.play();
        }

this code is good for only play and stop song....i want add pause song....how to do??

help me please!!!!