XA CONTROL is a parameter found in normal Voice Elements.

There are Groups that you can create for Elements so that some can be set to cycle while others do not. Following is a short guide on working with XA CONTROL and its Element Groups.

XA CONTROL is found in a normal VOICE
Press [EDIT]
Press [1] to view Element 1 parameters
Press [F1] OSCILLATOR
Press [SF1] WAVE

ELEMENT GROUP
The "Element Group" works as a parameter in the Xpanded Articulation Control (XA) function.

Element Group
Determines the group of the XA mode so that the Elements of the same group are called up in order or randomly. Assign the same group number to the Elements having the same type of XA mode.

The setting here is not available when the XA mode parameters of all Elements are set to “normal.”
Settings: 1 – 8

Translation: Any Elements that you place in the same ELEMENT GROUP will be treated as a set. For example, let’s say you are using the XA (Xpanded Articulation) called "wave cycle". This particular articulation will play the Elements one after the other: 1-2-3-4-5-6-7-8, 1-2-3-4-5-6-7-8, and so on. If you play a single note and repeat it you will hear the Elements play in order...

If however, you place the first 4 Elements in Group 1 and the second 4 Elements in Group 2, then each cycle will include two Elements simultaneously. 1+5, 2+6, 3+7, 4+8 and then it would repeat. That same single note repeated pattern will cycle but two Elements will trigger for each single note.

If you place the first two Elements in Group 1, the next two in Group 2, and the next two in Group 3, and the next two in Group 4... then each cycle will have 1+3+5+7, 2+4+6+8 and then it would repeat. That same single note repeated pattern will cycle with 4 Elements triggered for each single key press

Or in another situation you may want Elements 1-4 to play a "wave cycle" (one after the other in order) while Elements 5-8 play "wave random" (in random order)... the Element Group function allows this to happen. Simply place Elements 1-4 in Element Group 1, and Elements 5-8 in Element Group 2.

Extra Credit:
Call up the VOICE "Roundabout"
Category Search > MainCategory: Organ > SubCategory: Arpeggio
This Voice is setup for 8 Elements where XA CONTROL = "wave random"
All 8 Elements are in Group 1

Turn the ARP ON/OFF to OFF so you can manually step through the events... repeating middle "C" will let you hear how the Elements are either randomly recalled or they cycle through the Group...

Press [EDIT]
Press [1] to view Element 1 parameters
Press [F1] WAVE
Press [SF1] OSC

On this screen you can change the XA CONTROL = "wave cycle"
Use the Track 1-8 buttons to move between Elements 1-8 (the top line of the screen will indicate the current El1-El8)
Set them all to "wave cycle"... each note will advance to the next Element in the Group.
You can place some Elements in another Group

OK. Sweet.
I can see now what happens by looking at 'roundabout'.

Reminds me a bit of the Wavestation.
Thanks muchly.