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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Yamaha 920 / Yamaha Stagepas 100 BTRs / Senn e935 - LIVE
Roland RD 2000 / Tascam DP24sd / ATEM switcher - STUDIO