How to add a sound to a shape in PowerPoint using c#

Question

Here is my code:

I create a shape in a slide powerpoint. 

Microsoft.Office.Interop.PowerPoint.Shape rectangle = curSlide.Shapes.AddShape(Microsoft.Office.Core.MsoAutoShapeType.msoShapeRoundedRectangle, slideWidth - 110, slideHeight - 60, 100, 50);
    Sequence objSequence = curSlide.TimeLine.InteractiveSequences.Add(1);
    Effect pEffect_start = objSequence.AddEffect(rectangle, MsoAnimEffect.msoAnimEffectTransparency, MsoAnimateByLevel.msoAnimateLevelNone, MsoAnimTriggerType.msoAnimTriggerOnShapeClick, 1);

I can add an animation to shape, but with a sound I can not.

I want add a sound in this shape, when animation run so the sound is play. 

How can I do that?