Hmmmm, I was also curious what sound this is. It sounds very much like an EMD sound from the ESU library to be honest! I asked in a comment what the prototype sound is from and found my comment deleted this morning. I doubted my sanity for a minute and just to be sure I restated the question (in a polite way, giving them credit for a nice sound first) and again, comment deleted! They obviously don't like people asking too many questions!