I have been coding for this a little bit over the last weeks. A somewhat working version currently looks like this:

But I'm not entirely happy yet about the code. Some preparatory work is needed.

As it's a detail view hover shouldn't be needed. All stuff that is available in the hover information should be on the screen. If you want to have it in the list view I would recommend to have it in an edit mode than you have the benefit of see it in a list view and edit it.

Thanks for the input. Thinking about it more, I agree that a hover is unnecessary and it will become only visible when the information icon is clicked. The track detail view is also ready for genre and year which we do not queried yet. I want to add that later. I agree that eventually there should be the possibility to edit the metadata, but that is unsupported right now.