These are my thoughts on the construction of a simple Audio Player that works across Variants and has a bit more oomph than the Xara-generated one.

This approach embeds the MP3 into the Xara .XAR / .WEB file directly, which makes it easier for collating all the assets into one file but the file size can therefore grow quite large.

CSS JS - Alternative to Xara Audio Player.xar

Acorn