Lets try it step by step,
First lets see if you can have the audio player in your Gridder. you can add the following code:
<source src="https://freesound.org/data/previews/545/545208_3914271-lq.ogg" type="audio/ogg">
<source src="https://freesound.org/data/previews/545/545208_3914271-lq.mp3" type="audio/mpeg">
Your browser does not support the audio tag.
With ' +More - HTML " :
So we end up with something like this:
Then go to the actual page and make sure you can hear the music.
Then add the Shortcode of the Map to the Gridder Section above the Audio:
Are you able to set this up?
Let me know and best wishes :)