How do i start video and audio at the same time in ios

How do i start video and audio at the same time in ios?

I have tried a lot of different ways but i cant figure it out?

I can get the sound and animation (timeline) to start playing.

There is no problem to start the video and the animation at the same time.

But i cant get both the video and the audio to start playing when i press a button.

It works great in OSX and on windows?

Here is an example:

// insert code for mouse click here

// Play an audio track

sym.$("_1")[0].play();

// Play a video track

sym.$("host")[0].play();

// Play the timeline at a label or specific time. For example:

// sym.play(500); or sym.play("myLabel");

sym.play("marker1");