Play Piano Anywhere Learning to play the keys just got a whole lot easier! The Alesis Harmony 54 keyboard combines 54 piano-style keys, built-in speakers, 300 built-in sounds with layering and split modes, 300 built-in rhythms for playing along, 40 demo songs, a headphone input that automatically mutes the speakers for private practice, a music rest for holding sheet music or a tablet, a power adapter and even a microphone for singing along while you play. Powerful Learning Tools Harmony 54 includes 40 fun demo songs for you to play along with. There is even a One-Key feature that enables you to play the entire demo song just by pressing any key repeatedly – perfect for beginner pianists to play a full song without knowing all the right keys to play!