Wow this does chords ULeft and right arrows do something Use the up and down arrows to select the type of chord (major, minor, diminished, major 7th, minor 7th, dominant 7th, suspended, or augmented). Then press space to play the chord. Press R to generate a random chord. Press I to select a new instrument. (In general, voices and winds sound a little more interesting than percussive instruments.)
Thanks to ivan321 for the original project Chord Maker.