Could you compare the one smart piano sound to real piano sound? Support May 17, 2016 06:22 The ONE Smart Piano provides professional stereo sound, loved by both beginners and experts. Related articles What is the difference between the Smart Keyboard Pro and Smart Keyboard NEX? What kind of devices are supported? Does the sound come out of the tablet, or does the keyboard/piano have its own speakers? Does the keyboard have weighted keys? Manual Download Comments 0 comments Please sign in to leave a comment.