The Tyros4 features AWM Stereo Sampling for the most expressive and realistic tones possible. The sound engine has well over 1,000 Voices. Tyros4 is an open-ended instrument, allowing continual expandability. As new Voices are introduced, you can download and install them. Additionally, the onboard recorder allows stereo and multitrack recording. USB 2.0 connectivity allows unlimited recording to flash drives. For pianists who also sing, the Tyros4 has a microphone input and Vocal Harmony 2 for creating elaborate effects and textures. With 500 Auto Accompaniment Styles, the Tyros4 can back you up as well.The Tyros4 also includes standard features such as a built-in metronome, octave shifting, transposition, and tuning calibration.