The art of adjusting the string tension of each string to create the most pleasant sound when played with other strings.
Adjusting the action to make everything work properly.
Changing the tone quality, usually by softening or hardening the hammers.
Fixing broken parts, replacing a broken string, re-gluing several loose hammers or key tops, and fixing sticking keys. This is usually done on site.
Makes a piano sound like a full band.
Involves major reconditioning procedures, normally undertaken only in a piano workshop equipped with a piano workbench and non portable tools. Replacing a set of hammers, recovering the key tops with new plastic ones, restringing the entire piano and restoring a broken or cracked soundboard, are examples of rebuilding jobs.
Making all of the parts of the piano look new.