Xbox One Application: TV Theme Song volume

Hi,

When watching a TV show the theme song plays at a much louder volume than the actual shows. I've done a bit of digging and it seems you can adjust the volume of the theme songs on other players (Roku for one), but I can only seem to find the option to turn them off completely on the XBox One.

Is the only option to turn them off completely? Has anyone found a way to turn it down?