To edit the rotator scrolling speed do the following:
1. Backup the file “home-rotator.js” located in /wp-content/themes/event-manager-0.9.5/event-manager/lib/js/
2. Open “home-rotator.js” and look for the line autoScrollingSpeed:2000, (near line 15)
3. Change this value, an integer representing the milliseconds to perform the scroll.
For example, increasing it to autoScrollingSpeed: 8000, will reduce the animation speed.
You can find out more customization options here in the plug-in home page.