I am in need of a full keyboard which one can play in the key of C and have the ability to choose the output audio key. I play the highland bagpipes which is in two sharps, but is in a pentatonic scale with a diminished 7th.
I have used an older Casio keyboard which did not have the changeable key output and therefore one had to transpose ( very time consuming ).

Also is there a keyboard that has the two or three note chords (like guitar chords ) automatically able to be played when one plays the melody notes?