No Sound coming out of TV speakers using Itunes

My Windows 10 computer is connected via HDMI to my Sony TV. I cannot hear any sound when playing itunes imusic when using this setup. If I remote into the computer from another computer, using windows desktop, I get sound. Spotify works perfectly on this computer and plays music through the TV? ITunes won't generate any sound? Unfortunately, there are no good options for us Windows users to get support? I want to use Imusic but don't have any serial numbers for an apple product to get support? Icloud...don't got it? Might just have to stick with Spotify....at least it works?