The recording quality is very bad because I used my iMac, but here are recordings of my C2D MacBook Pro
inserting and
ejecting a DVD. The poor recording quality makes it sound worse than it really is, but not by much.
I believe this is the LG drive that is known for being noisy and appears in most recent MBPs. I thought it was broken at first so I had Apple replace it, but the new drive sounds exactly like my old one, which sounds like all of the MBPs I played with at my local Apple Store.