so here is the Sony Music Player app from ICS...
it should work on any ICS (4.0.4) ROM like CM9, AKOP, though i have only tested it to work on Xperia S CM9...
after installing the app u will get new icon in app drawer called "Walkman"
[ download link ]
Walkman v01 (its an apk)
additional files only for advanced users (contains: soundfx libs, audio_effects.conf & soundenhancer.apk)
P.S.: i also have the new gallery app but it gives an error while installing "missing shared library", if someone can point me toward the files which would be required i can post that app too