try this---
go onto google and search LiveATC KSEA and you should get a link to enable you to listen to live transmissions.
i am on there now, but since KSEA is pretty much asleep, there is nothing going on. so instead i am on dublin.
i used to fly in and out of there quite a bit but that was 1995ish, but it is all very civilized and much easier than anywhere in europe and the UK in my opinion.