SOX for windows bat scripts

I need a way to mix mp3's and other music files including iTunes, I would like to use SOX on Microsoft Windows. I need command line examples in windows batch files that can do the following: 1. Adjust the length of the tracks e.g. TRIM start and end 2. Mix 3 tracks together with variable fade example between tracks 3. Mix 4 tracks together with variable fade example between tracks 4. Example to adjust the (beats per minute) BPM of the outro of track 1 to meet with track 2 and the intro to track 2 to match the outro of track 1 Just to be clear, if track A is 125 bpm and track B is 120 they should beat match at 122.5 BUT for the most part of the track be at their natural bpm 5 Example of how to fade last track 6 Example of how to cross mix 2 tracks for about 20 seconds 7 Example of how to cross mix 3 tracks for about 20 seconds