Audio Works on KanoOS but doesn't on Raspbian

KanoOS runs on Raspbian, which makes things confusing for me - I recently upgraded my Kano to Raspbian with NOOBS because I wanted to use it for my project, the screen and the components were all good for it. Before, I could hear every noise, ex the startup sound, but when I upgraded, I can’t hear mp3s or anything! Is there something I’m doing wrong? I searched online and tried various fixes, but none worked.