Please, explain in more detail, how your conections PC-SD1....if you use a midi interface vs. a joystick adaptor.
In keyboard should be in the midi in 1.....the # 2 is for Midi pedals, or accordion, midi guitar, etc...that and in midi set up to either choose a preset or configure one.....if you are not an accordionist, guitarist using midi with the SD1, you could use the default setting.
I hope it helps.

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mdorantes