Volume slider is not working properly

Hi Binit,

Sorry you're seeing this issue! I just need to ask a few questions in order to understand what's happening better. Where are you experiencing this happening? It sounds like you're referring to when viewed on a mobile device, but I just wanted to verify. Are you viewing it in the Articulate Mobile Player? Would you be able to provide your .story project file for us to do some testing? You can attach it in a comment right to this thread. 

Thanku so much.

I got my solution in your question. I was doing wrong. I was playing index_lms_html5.html in web browser (Desktop)

Thanks for the update, Binit! Yes, you'll want to make sure to upload it to the environment for which it was published. Glad you got it figured out :)