Eddie pretty much hit the nail on the head. The only thing I might add is to carefully tune the EQ's of both the keyboard and the keyboard's mic settings. This is a very important step in achieving the best sound quality for both the keyboard and your vocals as well.

Good luck,

Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)