Audio [Q] [GT-I9300] Media Volume Error on RevoHD 51 C-ROM

I'm not able to listen to any music from any app/game when I set the media volume to anything above 25 (out of 30 steps). Till 25, I get crisp sound, but after that, it's like the phone's been muted. This happens only to the media volume rocker, the phone/system volumes are untouched and working well.

I'm on a custom ROM... Android Revolution HD 51.0 although, don't know if it's the ROM's fault... just putting it out there!
Please help me out here, a big thanks to those who do!