The Dink Network

So, I'm not sure what's wrong, but the midis have stopped playing in the background, in all the games (the sound effects are still working though)
I'm sure the reason is something obvious, but I don't really know what it is

A little help, anyone?

Well, I know back in the day I'd run into this problem in Windows 98 and XP where the midi volume would sometimes end up muted and I had to go into the Windows Volume Mixer and turn the midi volume back up. Windows 7 and beyond don't have a separate sliders for midi (unsure of Vista), so if you have one of those OS's, I would be unsure of how to fix this issue.

Oh, this is an old laptop with an old OS. I didn't even think to check *smacks forehead*
Thank you anyway!