Una corda pedals are an important part of a piano designed to change the sound of the instrument. These pedals are also known by many other names, such as the soft pedal, the shift pedal, or the left pedal. These different names for the una corda pedals highlight their different functions. The soft pedal, for example, is used to mute the sound of the strings, while the shift pedal is used to shift the hammers to a new position. There are other names used for the una corda pedals in different languages as well, for instance, the German word for the left pedal is "leise," which means "soft".