The tone of a piano can be improved by a process called voicing. The tone of all pianos will change over time. As the hammers strike the strings they wear and compact, causing the sound produced to become harsh or overly bright. Voicing can make a harsh tone more mellow, and can also make a weak tone stronger. Additionally, voicing can help even out notes that vary radically from their neighbors.
Your piano may benefit from voicing if:
If you are considering voicing for your piano, first, it should be tuned and regulated. Most voicing procedures are long lasting, so give yourself some time to explore the sound of a new instrument before deciding to change.