The effects of playing (causing felted hammer - heads to strike to strings) and the environment (humidity), will change the character of the hammer felt effecting its optimum singing capability. This can result in the piano producing an uneven and dull sound. To counteract this problem, the piano should be regularly voiced/toned using a combination of special toning needles and shaping and a great deal of skill. In the voicing process the resiliency of tile hammer felts is adjusted with special tools and then all notes are balanced so that the tone is uniform throughout the keyboard.
This is obviously a job which demands special skills and should be attempted only by a professional piano technician. We recommend that you contact one of our team for advice when voicing is required.
Voicing is to some extent a matter of preference. Some pianists prefer "bright" voicing while others prefer a mellower sound. Regardless of its original voicing, every piano will acquire a somewhat brighter tone with time, because the hammer felts will be compacted as they are thrown repeatedly against the strings. Therefore, depending on your taste and the amount of use your piano gets, it ought to be voiced when your ear tells you the time has come.
Experience has taught us that a piano which receives normal use in the home will need to be voiced every 2 or 3 years. Warning - only a piano technician with specific training in voicing should carry out this service.