Comment 9 for bug 949032

Hi David, thanks for looking into it.

It is not currently possible to add HUD items that are not visible in the menu (but there are some considerations to add that in the future).

In the mean time, the HUD could be patched to gain knowledge of the special type of menu item the sound menu is using for its player controls. Whenever it sees that kind of menu item, it would add the three entries "Previous", "Play", and "Next" to the HUD. However, these strings need to come from the sound menu itself to allow for translations. Also, it doesn't solve the problem of multiple players that you described: the name of the player has to be communicated as well.