I have been putting my new Zepher threw it's paces and noticed the horn had a different pitch intermittently or so I thought. Well I "glanced" at the directions! This not being exactly my first engine I didn't really read them that well. I'm thinking "Great" back to Lionel to see what's wrong with this thing! After going back to the book again I found out the Zepher has two horns. A tonned down horn for the city and a loud horn for the country."who knew" you need to press AUX-1 to toggle back and forth. Moral to the story? Read the directions no matter how long you've been in the hobby! Here is a short video of the sound difference.