Logic: Create a DJ style crossfader in the environment

Method 1

 * 1) In Logics environment you must first add a fader object and a transform object (Environment / New)
 * 2) Cable one output of the fader to an audio channel and then cable the another output to the transformer object.
 * 3) Double click the transformer object and set it's internal settings to reflect the image below (data byte two of the operations should be set to Reverse)
 * 4) Now cable the output of the transformer object to a different audio channel.
 * 5) When you move the fader objects slider it should now cross fade the two audio channels



Method 2
You can also create a crossfader tool using this method which will allow you to additionally set the initial volume of the source material.