
The A/B and C/D faders have multiple purposes. On a new show file the A/B are configured as Preset A/B Two Scene Masters (this is not useful on an ILC, but they would control the intensity attributes on the Top and Bottom Slider banks of the standard Marquee, see Slider Panels) and the C is configured as the Intensity Master for the Cue List assigned to that Playback whereas D is configured as a manual crossfader for that cue list. All the modes are described below.
Note: Regardless of configuration of the A/B and C/D faders, the [SELECT], [HALT/BACK] and [GO] buttons will function as normal on the appropriate cue list.
If you chose this option, the sliders will do nothing. If you are just doing a "GO SHOW", this is the safest mode of operation as inadvertent moves on these faders will have no affect.
In either case (A/B or C/D), the faders will be the overall intensity masters for the A and B Scenes. The B and D faders are inverted such that if you pull both the A/B or the C/D handles together you will execute a dipless crossfade between the scenes (i.e., Fader A is full when pushed up, Fader B is full when pushed down).
In this mode, the left hand fader is the overall intensity master of the cue list assigned to this playback and the right hand fader is, at will, a manual cross fader. The [GO] and [Halt/Back] buttons function as normal, but at any time you can grab the fade and manually complete it using this handle. If you [Halt] the cue, you can either press [GO] to complete it, or use the handle to manually complete the transition to the next cue. If you are sitting in a cue, moving the handle will initiate the transition to the next cue as seen in the Playback Bubbles:

All levels going up and down and attributes moving will be affected. All times will be re-scaled to the distance the handle has to travel, with the greatest time in the cue being measured using that distance and all others scaled to that. Wait times will be scaled too.
At any point before reaching the end of travel, you can move the handle backward to reverse the transition. Once you reach the end of travel, the next cue in the cue list will be pending. You do not have to physically reload a cue or move the fader back to its starting position. The next cue transition will begin by moving the fade off the end of travel you just reached or by simply pressing [GO].
If you hold down [SHIFT] while manually moving a Crossfader, you can move backwards through a cue list. (i.e., the cue that has just been completed will be the pending cue, rather than the next cue in the cue list). You can see which cue you are going to pull into by looking at the Playback Bubbles. In this case, the pending cue is Cue 1 - the cue just before Cue 2:

The Split Crossfader mode sets up the left-hand fader to, at will, manually control the levels moving up in the next cue while the right-hand fader manually controls the levels going down in the next cue. Moving these faders in tandem executes a standard crossfade. Both handles need to reach their end-travel destination before the cue completes. Once the cue completes, the pending cue changes and the handles are ready to execute the next manual fade. You do not need to exercise the full travel of the handles to re-load the next cue.
Notes on Playback Handles:
None-Intensity attributes fade when you move the left-hand slider.
If you press [HALT] while a cue is in progress, you can manually complete the cue by pulling the handle.
You can reverse the direction of the current fade at any time before the handle reaches it's end-point destination.
If you start a cue by pressing [GO], then, while the cue is in progress, you move the handle, that is equivalent to pressing [HALT] then manually completing the cue by pulling the handle.
If you move the handle to Halt a cue, but then decide you want the cue to complete in cue-time, you can simply press [GO]. You will have to park the handle at one end or another to make it active again.
If you Halt a cue for any reason and choose to complete it using the handle, all times will be re-scaled to the distance the handle has to travel, with the greatest time in the cue being measured from top to bottom and all others scaled to that. Wait times will be scaled too.
It does not matter if the handle is at the top or bottom when you start to use it. As long as it is at one end, it will function as a manual crossfader, moving you forward through the cue list.
If you want to manually crossfade backwards through the cue list, hold down [SHIFT] while pulling the handle. You will notice that the pending cue in gray at the bottom of the bubble will have a lower number than the current cue in black text up top.
If you set up the Slider Panels to hold Look Pages (see Slider Panels), the left and right fader will control the level of the first two panel's respective overall intensity. Both sliders are configured so full output is at the top of the travel.
If you set up the Slider Panels to hold Look Pages (see above), the left and right fader will control the level of the first two panel's respective overall intensity. The right fader is inverted so that full output is achieved by positioning the fader at the bottom of travel. This allows you to, while moving both handles, execute a crossfade between two separate pages of Look Masters.
If you are running a show live, it is handy to have handles to control how long attributes get to their new level and how long they should take to return to their old levels once released. This option sets up the left hand fader to control the IN TIME of any attribute you set using the command line or button array. The scale is from zero to ten seconds (top to bottom). The right hand fader controls how long releases should take or what is the sneak time.
See Also: