The KAOSS in Korg arrangers are very difficult to understand and use for live play, IMO. I have to google to see how some use this feature. I know it must be there for a reason!
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Live: Korg PA4X/Bose L1 Pro 8/Senn 935

Studio: Korg PA4X/Kawai MP7SE/Tascam DP24SD/Sony C80/AGK 214/ATEM Mini Pro switcher/