PS2 DVD sound issues

Had this problem for a while, but just realized I could ask here.
When I play games on my PS2, I get normal sound, but when I play movies, it seems like it's only playing half the sound. I have to jack the volume way up just to hear anything. I've tried looking at the settings, and can't find anything that seems amiss.
Anyone know what I can do to fix this? It can't just be mine that's done this. Thanks.
When I play games on my PS2, I get normal sound, but when I play movies, it seems like it's only playing half the sound. I have to jack the volume way up just to hear anything. I've tried looking at the settings, and can't find anything that seems amiss.
Anyone know what I can do to fix this? It can't just be mine that's done this. Thanks.