Professional Piano Tuning & Repair Services
The answer lies in the strings.
Piano strings are held to extraordinarily high standards of manufacture. The chemical composition of the steel, its tempering, the uniformity of its density, and above all the precision of its calibration — meaning the absence of any oval cross-section along the wire's length — all of these factors directly and radically affect how a tensioned string vibrates and sounds.
What Happens to Strings Over Time
As a string ages under tension, the metal fatigues. Its crystalline structure undergoes internal relaxation: the wire stretches unevenly, and sections with slightly lower density become thinner in diameter. At the same time, years of use in any environment with elevated humidity bring corrosion. Rust attacks the surface of the wire, leaving microscopic pitting. Low-grade steel is significantly more vulnerable to this process.
The result is a string that no longer vibrates cleanly. Even when its fundamental pitch is correct, the overtone series it produces becomes irregular and unpredictable — generating what are known as false beats: persistent, chaotic interference patterns between the partial tones of adjacent strings that no amount of careful tuning can eliminate.
The Particular Problem of Bass Strings
Wound bass strings present an additional layer of complexity. As the string stretches, the copper winding loosens and loses its density. In humid conditions, the steel core and copper winding form a galvanic pair, accelerating electrochemical corrosion at their interface. Over time, the winding may develop a green patina — copper carbonate — a visible sign of advanced deterioration. The result is a bass string that loses its singing quality and clarity, accumulating unwanted and dissonant overtones that muddy the entire lower register.
What This Means for the Tuner
Tuning is fundamentally an act of listening: the tuner listens for beats between intervals and unisons and adjusts until those beats are correct or absent. When the strings themselves produce false beats — particularly when the fundamental tones of a unison are aligned but their overtone structures differ — the tuner loses the very reference points the work depends on. Electronic tuners are equally confounded: they measure what the string is producing, not what it should ideally produce.
Under these conditions, the tuner can only rely on experience and judgment. And even with the greatest skill and care, the result will fall short of true clarity. It is simply not achievable with strings in this condition.
The Honky-Tonk Effect
This is why old pianos — even when carefully tuned — tend to sound honky-tonk: that loose, slightly out-of-tune saloon-piano quality familiar from silent film accompaniments. The same applies to cheap instruments with low-grade strings. This sound is not the tuner's failure. It is the voice of metal that has given everything it had.
So if you own an older instrument — or one that was never among the better-made — and it still doesn't satisfy you after a tuning, please don't be too quick to blame the technician. Sometimes there are entirely objective reasons rooted in the condition of the strings themselves. And an honest technician will always tell you so.