You have some control over the cues and fades of your files in both individually in your Smart Blocks and Playlists, and in AutoDJ in your general Airtime settings (Settings > General).
Look for this icon to adjust the fades for your Playlists and Smart Blocks.
Cues allow you to set starting and end points on a file. Airtime doesn't use cues, but you can adjust the Fades for your tracks to obtain a smoother transition between songs. Fades ins allow you to set a duration over which a file starts to increase in volume at the beginning of the track. Fade outs allow you to set a duration over which a track deceases in volume at the end of a track.