Built with Advanced Wave Memory technology for faithful reproductions of actual models, a bass boost system incorporated within each speaker, and soft-touch action for an organic, managed response, the Yamaha YPG235 76‑Key Portable Grand Piano is is a perfect pairing of authentic sound and modern convenience. Further powered by Digital Signal Processing (DSP) technology, the onboard effects like reverb and chorus shine through in the true stereo tone. Whether you need a workhorse practice setup at home or a reliable unit for gigging, the YPG235 is the key (76 keys, actually) to solving your quandary.