Some widespread piano tuning resources: From top to bottom: a tuning lever, a felt mute, a rubber mute, a felt temperament strip (left), in addition to a Papps mute. Popular applications for tuning pianos involve the tuning lever or "hammer", many different mutes, as well as a tuning fork or https://kameronqeqak.tkzblog.com/30763115/fascination-about-piano-repair