If you have a 100% stock ROM, then this won't work at all for you. Samsung has their proprietary Boot animation file extensions and they support sound. For non-stock ROMs, like CM7, CM9, CM10, or custom stock-based ROMs, you need to go to your root explorer (might be ES File Explorer or Root Explorer), go to /system/media and delete the bootanimation.zip (or, alternatively, change its extension to .bak, to keep a backup, just in case). Then paste the zip I provided, and change the permissions (by holding down the .zip folder, go to the "Change Permissions" option) this way:
x x -
x - -
x - -
Reboot, and that's it!
