Restrict next button until the current smart shape is playing its audio

Hi I am working on a project. There are 6 steps in my slide. Each step has the next step button with it. The steps are smart shape and they have audio assigned to it. When the slide starts step one begins and the button next to it will continue the project on clicking. What do I want? I want until the step one smart shape completes the user should not be able to click on this next button. Please […]