Footer player is triggered by a normal player.
If you have ZoomSounds players setup-ed in ZoomSounds > Settings > WooCommerce Loops, then you can add Add to cart buttons from their configuration.
For the configuration you are using in the loops go to Player Configurations
select the configuration you are editing
enter:
<div class="feed-dzsap-for-extra-html-right">Buy Licence</div>
if you want the product id you can do
<div class="feed-dzsap-for-extra-html-right">Buy Licence</div>
this does not work as the playlist changes. the product id remains the same. It should also change to the one currently being played.
we will check