The analog sound box has been developed as a joint effort between engineers at Kato and Soundtracks to craft a simple, versatile, and powerful sound system for use on non-dcc layouts. Completely self-contained, the ASB has a built in speaker and will allow modelers to enjoy an “in-cab” experience while operating their favorite trains! Using separate plug-in sound “containers”, cartridges each with their own individual sound and programming sets (even including things like momentum!), the ASB is a “smart” device, not just making sounds but reacting appropriately to the actions of your locomotives by reading back-emf from the motors. Steam locomotive chuffs will speed up and slow down according to the speed of the locomotive itself; not just the position of the throttle, making the sound a properly interactive experience!