Adjust piano strings to attain a specified pitch.
What does a Chip Tuner do?
Adjusts piano strings to attain specified pitch, in first tuning of partially finished pianos: Rubs strings with wood block to remove irregularities, such as kinks. Plucks specified C or A string with pick and adjusts tuning pin with tuning wrench until pitch of string and tuning fork or bar are in unison. Plucks remaining string and adjusts to specified pitch by aurally comparing with previously tuned strings.