The Grand Piano Muffler system is designed to achieve a more desirable listening environment by reducing the volume of your piano and giving it a warmer tone. Installing the system allows you to slide a felt rail into place between the hammers and strings. This decreases the impact of the hammer striking the string, resulting in a lower volume without distorting the tone or shortening the sustain of the note. The feel of the keys are unchanged after engaging the muffler system. Whether you have a player system in your piano that doesn’t play as softly as you would like, live in an apartment and don’t want to disturb your neighbors every time you practice or just want your piano to take a back seat at your dinner party, this system is perfect for you.