The sound source of this series is the acclaimed and incomparable Shigeru grand piano SK-EX sample, using Kawais Progressive Harmonic imaging Technology , which employs full 88 key sampling , giving the piano sound a rich dynamic responsiveness , which is loved the world over by pianists of every nationality. The CN range now offers far greater variety of sounds in the range ,(upto 325 on the higher models) . There are added Drum beats and drum kits to choose from , allowing you to now play along to rhythm styles.One of the great additions of this series is the onboard lessons feature , taking the player through favorites such as Burgmuller , Czerny and the Alfred series of piano pieces , all accessed to learn through the lesson feature. There is also Kawais Concert magic , tuition feature , allowing the non player to enjoy playing the piano , by playing Any key in time along to pre recorder tunes in the piano, (upto 88 on the cn 37).A standard feature that many players require today is a headphone socket , for evening or quiet practice. Kawai gives you a enhanced headphone feature with its SHS system , offering 3 different presets for enhanced sound and playing pleasure. Allowing you to select Open, semi open, closed ear headphone types , to best suit your playing experience.There is Bluetooth connectivity , a feature that is becoming more and more desired by musicians in these times of usage of streaming music etc. With Bluetooth you can connect to Kawais virtual tech app , which opens up a fantastic array of features that you can adjust within the piano to suit your room style and your playing , fantastic feature . The app also offers educational aspects to players performance and general learning techniques.