(Click on “Sound LIbrary”. Some very nice samples. One of the cleanest samples is an RS5T sound byte. IMHO, Good enough to be used for a sound decoder. I plan on using it for my HO Seaboard Coast Line locomotives once I get the Digitrax sound decoders )
Oh boy. I am going through the same thing. Did not realize there were so many customized sounds available now. I am trying to match up an SD70-MAC from Alaska. I have found everything you would want to know about this engine and then some. Looked at several horn sound sites. But have been unable to find out just which horn matches a particular engine.