Piano emulates a number of classical and jazz piano sounds as well as several accordions and a harpsichord. It also provides a number of pad sounds.
Volume slider: Sets the overall volume level of the instrument.
Filter Cutoff slider: Allows less sound through at low values and more at high values—damping the sound or making it brighter.
Release slider: Determines the time it takes for notes to fade out after you let go of the keys on your keyboard.