There is more to tuning than deriving a pleasant aural benefit. When
done in accordance with the responsible manufacturer's recommendations
for a new instrument - frequent in-store tunings plus a minimum of four in-home
tunings during the first year and twice per year thereafter - in the
hands of a knowledgeable and capable piano technician the integrity of the strings is maintained.
New piano string is elastic. When delivered to the buyer
the strings are still stretching. The four in-home tunings are
required for the piano to remain at pitch with two tunings per year
thereafter to ensure that it stays there. Stretch slows and then becomes negligible.
Slight
bends form in piano strings from sidebearing where they contact bridge pins. When the new piano is tuned frequently as mentioned
above, these bends can move to the speaking segment and smooth out
rather well due to this elasticity. However, if a couple of years have
elapsed since the first in-home tuning and the piano has fallen
substantially below pitch, the required huge pitch raise(s) will force
these now less-than-elastic bends into the speaking segment of the
string and create false beats - and even cause permanent deformation or "wild strings" in extreme cases.
What may be done? The damage is not necessarily irreparable. Neither is it always expensive to repair. Sometimes a good
tech can smooth the bends and minimize or "hide" false beats. A string may need replacing. The cost here is modest. Many pianists and even some piano tuners may not be bothered by false beats because they cannot hear them. Accordingly, for these individuals there is no problem to correct. Or so it would seem. However, depending upon the extent of the problem it could get quite expensive to remedy. Consider the following:
"When tuning has been neglected
for an extended period of time, the strings in the tenor, mid-range and
extreme treble have often dropped in pitch much more, in comparison with
the bass strings which have also dropped in pitch. The string tension
has decreased so much and unevenly, that the soundboard and bridges have
warped out of shape, placing tremendous strain on wood and glue joints,
risking severe damage."
“…pianos are designed to be at a specific tension. When
the tension is allowed to go flat the soundboard may flatten resulting
in less downbearing on the strings and an increase in the chance of wild
strings, cracks in the soundboard and case and frame parts separating."
- Cited from the Randy Potter School of Piano Technology, Inc. by Randy Potter, Registered Piano Technician, chapter 1.8 pg.16.
"If the piano has fallen
substantially below pitch (i.e. from not having been tuned frequently
enough), the process of pulling the strings back up to pitch often
brings these little bends out into the speaking segment of the string
without having had the opportunity to straighten out gradually. A
competent tuner can usually remove these unwanted bends in the string,
but it's additional work, and you may get charged more. Some tuners who
are not so competent just leave them and hope they'll straighten out
over time. And sometimes, no matter how good the tuner is or how hard he
tries to remove a false beat, you're stuck with it."
- Piano Finders®
"Can the
Piano Be Damaged by Not Having it Tuned?
"To keep a piano untuned for many
years could do permanent damage to the piano. The strings
are under a great deal of tension and tend to loose their
tension over time. If the piano is kept untuned for too long
you run the risk of the total pitch of the piano dropping.
To bring the piano back to standard pitch may cause, at
best, the necessity for several tunings over several weeks
(at a higher cost) or, at worst, string breakage, and split
bridges. Not only that, but playing on a poorly tuned piano
can cause a potential musician to subconsciously not enjoy
playing and hence, not wish to play."
- Carl Radford, RPT
"Distortion in sound. In rare cases major
tuning work can bring bends into the speaking length of the string
causing distortion in the sound. Restringing is the only solution in
this case." - Daniel Berg, RPT excerpt from Results from years of neglect.
"Take care of your piano by not
neglecting it for extended periods of time. Piano strings stretch over
time, and if left untuned for long enough, a piano will require a major pitch raising when it is tuned again. A major pitch raising is not good for the health of your piano; it increases the possibility of breaking some strings and/or may introduce a permanent out-of-tune sound known as 'false beating.' " - Gooch Piano Service
"Does Piano Tuning Neglect Harm Your Piano?
"To my knowledge, all professional piano tuners agree that neglecting
regular service does harm pianos. When piano problems begin to develop, a
professional piano tuner, who regularly services your piano, can help
with advice and solutions. Pianos do not last forever, and those that
receive regular tuning and service uphold their value better than
neglected pianos.
"Even if, no one is playing your piano, the weather is playing it 24 hours a day, and it needs regular tuning.
"With over 20 tons of string pressure, manufacturers design pianos to
be maintained at A440 standard pitch and when pianos drift off-pitch the
curvature of the soundboard changes and the whole structure of the
piano shifts. The strings in the piano produce about 18 to 22 tons of
tension. The cast iron plate supports this tension, but the rest of the
piano is mostly wood, which makes the piano extremely flexible.
"Everything in a piano is either made of wood, or depends on wooden parts to function.
In wet, humid conditions, the piano swells; and in dry conditions, it
contracts. This bending and shifting is not productive for the health
of your piano. In Physics, the piano as a whole is a ‘flexible’
structure.
"Allowing the piano to cycle through periods of neglect, or ‘hit and
miss’ service, combined with changes in humidity ~ the seasonal bending
and changing of the soundboard and overall structure ~ can damage the
piano. Allowing it to go through such cycles of neglect, in my mind, is
like bending a green twig; at some point, it is going to break."
- Chuck Littau Piano Services
"The
false beat is one of the tuner's worst enemies. This is a beat within a single string
that you can't eliminate by tuning. A string with a false beat sounds like two
strings that are out of tune with each other. False beats occur most commonly in the
upper middle register of the piano, from the treble break up to the middle of the top
octave.
"Other causes of false beats include rusty strings, kinked or twisted treble strings, and
strings that were stretched too much during stringing, pitch raising, or tuning. If you see
a kink or bend in the speaking portion of a string, try to straighten it by burnishing with
a steel rod. If this doesn't work, loosen the string and straighten it carefully with smooth
pliers. If it still sounds bad, replace it."
- Piano Servicing, Tuning, and Rebuilding,
Arthur A, Reblitz, RPT
BOB WIDDING
PIANO TECHNICIAN
