Using Myriad Playout v4 I found myself wanting to pre-fade the next song without it affecting the backtiming or dashboard for what was playing on air at the time. I wanted to use the fader I was going to be eventually playing the item on air from. In order to achieve this I have used the Myriad Command language to force players into and out of Preview Mode.
Below is a pdf of how I did this. Enjoy