Just whisper in its ear and tell it to play a C augmented chord. You can say what you want, it is my instrument of choice, and I do consider it an instrument.
Not that different from playing with a band where the bass player, drummer, rhythm guitar player follow you and play in the right chords while you play the lead and sing. I just don't have to pay my left hand.
And before everybody gets worked up, I do know that playing with a band is far more fulfilling to many musically and artistically. Generally not monetarily though.
Here I go again defending arrangers on an arranger forum.

KARAOKE is KARAOKE whatever way you perform it.
This is not a good advert for arranger keyboards, not at all.
Also, if sit like this with stiff eyes and look absolutely terrified, imagine be a guest in a restaurant with this kind of performance....

As the last song in the video says "He did it his way".

Convincing the audience where all that music is coming from is the
main concern with an automated arranger KB, as the average listeners first thought is "Honey he must have everything pre-programmed inside that thing to get all that music?". You can't blame them for thinking that 9 out of 10 do they hear a full band but only see one person playing!! & why should they know what we're doing anyway?....As long as they enjoy the music being played in whatever way it's done is all that matters. At least if your a singer also they see you doing that live to enforce that fact that you have talent....why do we always have to explain the process to anyone?....That's unless you only play in your living room, in that case the player has to enjoy what they are doing.

He performs on Cruise Ships also

Maybe just maybe there is Hope for Me Someday! I just have to learn to sing better. Harold

Oh please tell me you didn't watch the whole thing!!

Don isn't that the same hat you have? lol.....

No. If it were I'd burn mine!
I suppose we shouldn't be so critical. The guy is out there doing his best. Sorry I couldn't say that without a smilie.

just lose the keyboard, grab a mic and just sing...