Sorry the korg has 4 performance buttons memorised with each songbook entry. I know because that's how mine is set up. It even allows 4 performances with each mp3 midi or mp3+g file.
MEL
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KORG PA1000, KORG PA900, 2 BOSE S1 PROS, 2 BOSE L1 COMPACTS, YAMAHA STAGEPAS 500, ROLAND VP7