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.