Haven't got an XV, but I can tell you what Key ranges are:
It sets the area of the keyboard that patch/tone responses to.
So for example:
A zone may have a bass part on the bottom part of the keyboard, but then splits to another part at a certain point.
The bass parts keyrange would be from C 0 to C 3
The other parts would range from C#3 to C 7
You decide what parts of the keyboard you wish the patches/tones to use.
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The Sonic Energy Authority - a sound investment
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The Sonic Energy Authority - a sound investment