Music not showing up on computer or app but is playable

[AC Question]

So I just added a few albums to my phone, If I use a file explorer program like astro I can see the files and PLAY them so they are there somewhere. The issue is they won't show up in any player. The really strange part is when I plug it into my computer with a usb the files don't show up that way either. However, like I said I can play them if I go through a file explorer on the phone itself