Tuning vs. Regulation vs. Voicing: What’s the Difference?
By Eathan Janney, Founder — Floating Piano Factory
Piano owners are sometimes surprised to learn that “tuning” is only one of three distinct types of maintenance a piano can receive. Regulation and voicing are separate services — each addressing a different aspect of the instrument — and understanding the difference helps you make better decisions about your piano’s care.
Here is a plain-English guide to all three.
Piano Tuning
Tuning is the most familiar service, and the one most people have heard of.
What it addresses: pitch — specifically, the frequency at which each string vibrates.
What the technician does: adjusts the tension of each string by turning the tuning pins until every note is at the correct pitch and in proper relationship with every other note.
What it does not address: the feel of the keys, the weight of the action, the brightness or darkness of the tone.
A well-tuned piano may still feel uneven, have keys that are sluggish or too light, or sound harsh or dull. Tuning alone cannot fix those things.
How often: most pianos benefit from tuning twice a year. Performance-level instruments and active teaching studios often benefit from three or four times per year.
Regulation
Regulation is the adjustment of the piano’s action — the mechanical system that connects the keys to the hammers and ultimately to the strings.
A piano’s action is a complex assembly of wooden parts, felt, leather, springs, and hinges. Over time, this mechanism shifts out of optimal adjustment. Felt compresses. Wood swells and contracts with humidity. Springs lose tension. Screws loosen.
What regulation addresses:
- The feel and responsiveness of the keys
- The evenness of key weight and key height across the keyboard
- How quickly a key can be repeated (important for fast passages)
- The precise moment a hammer strikes the string relative to how far the key is pressed
- The behavior of the dampers that stop notes from sustaining
- Dozens of precise mechanical relationships throughout the action
What the technician does: makes systematic adjustments to the action components — sometimes hundreds of individual adjustments — so the piano responds consistently and evenly from one end of the keyboard to the other.
What a regulated piano feels like: keys that respond evenly, reliably, and responsively. A pianist who sits down at a well-regulated instrument feels that the piano is working with them, not against them.
How often: most pianos benefit from regulation every three to five years, depending on use. Pianos used heavily, kept in environments with significant humidity swings, or showing symptoms of uneven touch may need attention sooner.
Signs your piano may need regulation:
- Some keys feel heavier or lighter than others
- Certain notes do not repeat quickly
- Keys are at uneven heights
- The action feels “spongy” or imprecise
- You are working harder to play softly
Voicing
Voicing — sometimes called tone regulation — addresses the sound of the piano: its brightness, warmth, evenness of tone across the keyboard, and overall character.
Piano hammers are felt-covered wooden mallets. Over time, the felt compresses and hardens through repeated contact with the strings. A hardened hammer produces a brighter, harsher, often less musical sound. Conversely, a hammer that is too soft produces a weak, unfocused tone.
What voicing addresses:
- The overall tonal character of the instrument (bright vs. warm, hard vs. soft)
- The evenness of tone across the keyboard (so notes do not sound harsh or weak relative to their neighbors)
- The balance between treble, mid-range, and bass
What the technician does: primarily works on the hammer felt — either needling the felt to soften it, or treating it to harden it — as well as addressing other factors that affect tone. Voicing requires a trained ear and considerable skill; it is a form of artistic judgment applied to a mechanical process.
How often: voicing is not a routine maintenance item for most home pianos. It becomes relevant when the piano’s tone has changed noticeably, when hammers are visibly worn, or when a musician needs the instrument to match a specific tonal ideal.
Signs your piano may benefit from voicing:
- The piano sounds harsh or bright in ways that were not present before
- Some notes sound significantly different in character from their neighbors
- The instrument sounds “clangy” or metallic at the strings
- The tone feels thin, unfocused, or lifeless
The Three Services Together
Tuning, regulation, and voicing each address something different:
| Service | Addresses | Primary Tool |
|---|---|---|
| Tuning | Pitch (how notes relate to A440) | Tuning hammer, ETD |
| Regulation | Touch (how the action feels and responds) | Regulation tools, gauges |
| Voicing | Tone (how the piano sounds in character) | Voicing needles, treatments |
A piano can be perfectly in tune, feel wonderful under the fingers, and still sound harsh — or sound beautiful and feel sluggish. These are genuinely separate dimensions of the instrument.
For most home pianos that are regularly maintained, tuning is the primary recurring service. Regulation and voicing become relevant when something about the feel or sound has noticeably changed, or when the piano is being prepared for performance.
What Happens at a Floating Piano Factory Appointment
When I visit a piano, I do not just tune it and leave. I assess the action, evaluate the tone, and give you a clear picture of what the instrument needs — now and in the future.
My service tiers — Essential, Signature, and Premier Care — reflect different levels of attention and evaluation, from thorough professional tuning to deeper instrument assessment and care recommendations.
If your piano needs regulation or voicing, I will tell you directly, explain what it involves, and let you decide how to proceed.
Questions?
Or use the chat on our website to ask any question about your piano’s condition and what it might need.
Eathan Janney is the founder of Floating Piano Factory and has been tuning pianos professionally since around 2000.