The Yamaha DGX-670 gives you the natural feel of Yamaha's GHS weighted action — heavier in the bass, lighter in the treble range — that incorporates matte black keys to absorb moisture for a supremely comfortable playing experience. Sonically, the DGX-670 raises the bar with Yamaha's cutting-edge CFX Stereo Sampling, which delivers the inimitable, majestic sound of the company's flagship CFX concert grand. Plug a microphone into the Yamaha DGX-670's mic input and sing along with your playing — you'll hear your vocals through the onboard speakers, and you can record your performance to USB memory.