Add audio (mp3) files to a slide with controls (play, pause) and a seek bar

Hello Manik, 

Thanks for reaching out! 

You can control exactly when an audio file on your slide will play by using the 'Play media' trigger. Here's a screenshot of how I'd set this up: 

While there isn't a built-in feature that you can use to show a seekbar for an audio file other than the seekbar in the Player, you can check out this solution shared by a member of the community which addresses a design inquiry similar to yours: 

• Adding an audio seekbar?

I’ll be happy to pass your design requirement on to our product team, but you can also feel free to detail them more through a feature request!