In piano, beside handling keys with your hand, and your feet called upon to work the pedals to control other aspects of the music. Most of classical pianos have three padals

• The damper pedal (the far right): this pedal make your note fade away gradually.
• The soft pedal (the far left): This pedal make your piano sound softer
• The middle or the sostenuto pedal (the middle): unlike the damper padel, this will help sustaining the being played note or group of notes 

Piano Three pedals