I don’t know what Ilivid is but our audio files are certainly not Microsoft specific. They are just mp3 files. It may be a setting on your browser which is trying to play the files using that program. I have a Mac and the audio files play just fine for me in Chrome, FF or Safari.
What it sounds like you’ll need to do is the following:
Open up Finder, then right click on an .mp3 file and select “Get Info”. From here, there’s a section called “Open with:”. Click on the dropdown list and select “iTunes”, then click “Change All…” and select “Continue”. Now all of your mp3 files will automatically open with iTunes. You can follow the same process if you would like to open them with VLC, Audacity or another app as well.
I should also mention that you may want to uninstall iLivid. You can do this by finding it in your Applications folder then dragging it to the trash. That should hopefully clean up any remaining issues with iLivid.