Before you do that, make sure you have your audio settings set to 48khz. Also, build 25 has made a lot of improvements to the sounds, so grab that. You might just not be used to the new sounds. Give it a week or so. They have a MUCH higher recording quality than the old ones, though, so they should sound better. If there's something specific you don't like, I'd rather get feedback on it so it can be improved rather than have you just switch back to the old sounds with no explanation as to why you don't like the new ones.