Akai S6000 Operator's Manual page 224

FX
As well as copying all four channels of effects, you may also copy individual channels. For example,
in the main MULTIFX page, F16 shows COPY MULTIFX1 (or 2 depending on the selected channel):
Pressing this will show this prompt:
You should select the multi you wish to copy the multiFX chain to and press YES (or CANCEL if
you change your mind).
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Version 1.21