Main Types of Piano.

Grand piano

Strings and soundboard lie horizontally. The action benefits from gravity and can support fast repetition and fine control. Sizes range from compact baby grands to concert grands. A longer instrument can allow longer bass strings and a larger soundboard, but design, condition, and preparation remain critical.

Upright piano

Strings and soundboard stand vertically, saving floor space. Uprights range from compact models to tall professional instruments. A well-prepared upright can be an excellent home, school, studio, or rehearsal piano.

Digital piano

Uses electronic sound generation and speakers instead of acoustic strings and a soundboard. Important features include weighted and graded key action, pedal support, sound quality, polyphony, speakers, headphone use, connectivity, and serviceability. A digital piano does not require acoustic tuning, but its feel and acoustic behavior differ from a stringed piano.

Hybrid and silent systems

Hybrid instruments combine elements of acoustic actions and digital sound. A silent acoustic system can stop the hammers before they strike the strings and trigger sampled or modeled sound through headphones. Features vary substantially between makers.