That's because it's a lower bitrate with less tone-differentiation, the bass ends up drowning out the finer midtones and the high ends are more digitized and prominent it. It's like when you're in a car with the speakers muffled, so all you hear is the bass, but you can also hear high pitched sirens like ambulances, but can't hear voices outside. I can rip it once I get home, all my epsxe emu and ripping software is on my desktop