Introducing new baby to old cats - Sound therapy CDs

[kiteflying]

We have just spent £16 on a CD of baby noises on the advice of some spurious column in a pregnancy magazine. Problem is, the cats seem utterly unphased by it, and I think quite honestly it is because it is recorded sound and not a real cry in the house. Either that or my cats really are as placid and unphaseable as all the cat minders say they are. And yet, the eleven year old's fear of the hoover still gives me pause. And the sixteen year old might freak out just by having a closed door between himself and myself for long periods as he has shadowed me for as long as we have lived together.
Has anyone some real life experience of introducing a baby to old (and precious) cats without causing them undue stress?
We have ruled out them being in the same room as the human family while we are all sleeping (and this will be a shock to them) but I would like them to be around the baby otherwise.
I saw a TV programme about a home birth in which the cats were actually in the same room as the birthing. We won't be doing that.

My friend just had a baby and their other "baby" - 15 year old cat - has completely ignored her, so much so that after the first week they let him back into the bedroom to sleep at night.

Our cat was the same (5 years old). Had a bit of a sniff and then carried on as normal. Up until fairly recently when ds became aware of her, they have exested in parallel universes quite oblivious of each other's existence. I think this is pretty common.

My cat, and my friend's, just leave the room when the crying gets too loud to sleep through.

My Feline-PFB was elderly and the apple of my eye. He took no notice of my human PFB and quickly mastered edging his way onto my lap whilst I was bf'ing. He was too elderly to be able to jump in the moses basket or cot. My two younger ones would go up and sniff and wonder off.

My old cat and my toddler became very close as the cat loved attention in any form and but up with any abuse. Sadly the cat died a few months ago. The other two haven't taken kindly to the daily chasing and mauling and stay well away!

Thanks all of you! I now wish I had not bothered with the CD but we were determined to do something to prepare them.

My two cats were about 11 when DS1 was born .. not interested , nearly 7 yrs later still not interested . .