Some popular piano tuning resources: From top to bottom: a tuning lever, a felt mute, a rubber mute, a felt temperament strip (still left), plus a Papps mute. Prevalent instruments for tuning pianos involve the tuning lever or "hammer", a number of mutes, along with a tuning fork or electronic https://heads-up-display-helmet31975.dailyblogzz.com/31407323/about-piano-repair