I have looked through the plugins page and done some extensive searching on github, but I cannot find a plugin that allows for background audio to play. I have seen a module in the Adapt showcase which appears to be using audio along with Trickle to show a continue button after a voiceover file finishes. Now this voiceover plays automatically and so there isn't an actual audio player visible if that makes sense.
Is anyone aware of a plugin that can achieve this? Background audio is very useful in eLearning.