Can you speed up the player in Articulate 360?

I've got some JavaScript code that will speed up and slow down audio playback in HTML5. I use a SL embedded variable reference ("playbackSpeed") to show on screen the playback speed. You can put these JS code bits on buttons and test it out:

//slow down

var player = GetPlayer();
var SLplaybackSpeed = player.GetVar("playbackSpeed");

if (SLplaybackSpeed>0.5) {
SLplaybackSpeed -= 0.25;
}
var myAudio = $("audio");
myAudio[0].playbackRate = SLplaybackSpeed;

player.SetVar("playbackSpeed",SLplaybackSpeed);

// speed up 

var player = GetPlayer();

var SLplaybackSpeed = player.GetVar("playbackSpeed");

if (SLplaybackSpeed<2.00) {
SLplaybackSpeed += 0.25;
}

var myAudio = $("audio");
myAudio[0].playbackRate = SLplaybackSpeed;

player.SetVar("playbackSpeed",SLplaybackSpeed);

//

To control video, just replace the 

var myAudio = $("audio");

with 

var myVide = $("video");

What I'd like to see in tandem with this is to control timeline playback speed. Haven't cracked that one yet. Anyone have any ideas?