Play/Pause streaming audio button for each frame

I have streaming audio on each frame that automatically starts and stops when the next or previous frame is clicked. I need to add a pause button on each frame. I have created a play/pause toggle movie clip on my first frame and it works fine. Frame one uses mySound1 and myChannel1, frame two uses mySound2 and myChannel2, etc.

When I try to add the code to the next frame I get errors. What do I need to do to have a button on each frame to stop the corresponding mp3? I appreciate your help!

SoundMixer.stopAll();

var pP:Number = 0;//playback position

var playing:Boolean = false;

var mySound1:Sound = new Sound();

var myChannel1:SoundChannel = new SoundChannel();

mySound1.load(new URLRequest("Physiology Slide 01 INTRO.mp3"));

myChannel1 = mySound1.play();

SoundMixer.stopAll();

PlayPause_btn.addEventListener(MouseEvent.CLICK, togglePlay);

togglePlay(null);

    function togglePlay(event:MouseEvent):void {

        playing = !playing;

        if (playing) playS();

        else pauseS();

    }

    function playS() {

        myChannel1 = mySound1.play(pP);

        PlayPause_btn.gotoAndStop(2);

    }

    function pauseS() {

        pP = myChannel1.position;

        myChannel1.stop();

        PlayPause_btn.gotoAndStop(1);

    }