The Steinway baby grand circa 1906 in the living room at work has been having trouble holding a tuning.
Our tuner/technician said the pins which hold the strings are slipping so they need to be replaced with slightly larger diameter pins and new bushings.
There are 250 pins which hold the strings taut to create the correct pitch.
Each one is taken out and replaced with a new one then the piano wire is rewound around the pin and tightened.
The metal pins are beat in with a metal hammer.
Two days of clanging and banging before the piano could be lightly tuned.
The tuner is coming back to retune in a couple of days because a newly pinned piano takes a while to maintain the tune.
What’s your instrument?