This simplified piano tuning method
uses proper tuning tools and a basic electronic tuner

Clear explanations of piano tuning for beginners are hard to find. When I wanted to learn how to tune a piano, most sources said not to try, hid basics in a mountain of detail, or insisted I buy a book. I taught myself to tune a piano instead. This method will not replace a professional, but executed carefully it can fix a single note or tune the entire piano.

Piano tuning is mechanically simple but difficult to master. Turning pins and listening may not seem complicated, but professionals spend a career perfecting their piano tuning skills. Our tutorial is only an introduction to how to tune a piano. Read it carefully, work slowly. You are probably not going to tune a piano to perfection any time soon. You certainly will understand your piano better, and perhaps discover a talent for tuning a piano. Even pros started somewhere.

Piano Tuning Tools

Piano tuning tool kit used for the tuning method outined

Piano tuning requires special piano tuning tools.

Get the right tools for the job. You will have better results, less frustration, and be less likely to damage the piano. A basic set of good quality tools will cost less than a single professional tuning. I use the following piano tuning tools, purchased from piano tuning tool suppliers on the internet. I do not recommend homemade workarounds like socket wrenches or foam chunks.

Piano Tuning Lever

The essential tool for tuning is the piano tuning lever, hammer, wrench or key. A tuning lever is specifically designed to fit piano pins, which are square but also tapered. Its star-shaped socket fits piano pins at multiple angles for the better control. The most popular tip size is "#2."

To feel the subtle motions and maintain absolute control, you need a solid tool with no wiggle in the handle and a secure fit on the pin. Inferior tools may fit the pin poorly, slip, bind, wiggle, bend the pin or break it outright. Simply put, in piano tools, the more expensive, the higher the quality. $20 tuning levers are, in a word, useless. While descriptors vary, avoid "budget," "bargain," "economy," "beginner" or "gooseneck" levers. "German made" and "Grover-Trophy" are likewise poorly-regarded descriptors. Medium-quality models are often labeled "student," "apprentice," "craftsman," or "professional"--but be careful about labels--if the lever price is cheap, it's a cheap lever. Compare the variety of tuning levers available at PianoSupplies.com.

Medium quality models like that pictured or better have interchangeable heads or even interchangeable tips in case you run into an odd pin or a cabinet configuration where a shorter or longer head is better, or just prefer the feel of a different size. Spend at least $50 on the tuning lever alone. The least expensive levers that professionals use are made by Schaff in the $120 and up range. (If this sounds expensive, be aware that some professional levers are $700 or more!)

Do you need a tuning tip wrench? If you purchase a lever with an interchangeable tip, purchase a tip wrench as well to properly tighten the tip without damaging it. If you do not use a tip wrench, the tip is likely to unscrew while attempting to turn a pin. (A tip wrench is not needed if the head and tip are a single solid piece, such as the piano tuning lever pictured in this tutorial.)

Do not use a crescent or socket wrench. I tried it; it was a disaster. It slipped off the pin, tended to damage the squared corners of the pins, had too much wiggle for a good feel and was too short to control the turn. Do not risk damaging, bending or loosening pins. Buy a proper tuning lever!

Electronic Chromatic Tuner

I began tuning with a Korg CA-40 Large Display Auto Chromatic Tuner. This little fellow is KEY (no pun intended) to making this process as painless as possible. I tried using a tuning fork at first, but it was too difficult. The electronic tuner makes it much easier and faster. It is around $20 shipped from Amazon.com. It "hears" the tone you are nearest, and automatically adjusts the display to match without having to press more buttons. It will also play all the tones in the middle octave. The CA-40 will do the job, but there are better options.

The best handheld tuner short of a professional electronic piano tuning device is the Korg OT-120 Wide 8 Octave Chromatic Orchestral Tuner. Its primary advantage for piano tuning is that it has a physical needle, rather than an LCD digital emulated needle. A physical needle is smoothly responsive; LCD needles tend to jump as they move between the gaps in LCD display positions, making subtle distinctions difficult. Moreover, the OT-120 needle can be adjusted for sensitivity, labeled "slow" to "fast" on the dial. I keep mine on the slowest setting. This keeps the needle from flapping around from temporary harmonics. Other nice features are a more detailed display, a backlight, and the ability to select a pitch rather than rely on the tuner to auto-detect. The OT-120 also "hears" a wider range of octaves, and will display the octave number, though this is not particularly important for the act of tuning (see below for why). You can get by with a CA-40, but the OT-120 is more helpful.

Chromatic tuners come in many brands and styles. The very best electronic piano tuners, referred to as "Electronic Tuning Devices" or ETDs by pros, are like the Peterson AutoStrobe 490ST Piano Stretch Tuner. These are $500 to $1800 or more. For the do-it-yourself method in this tutorial, any chromatic tuner can work. Be careful with tuners labeled for guitars; some will not work because they may recognize fewer notes than a full chromatic tuner or don't have the display we will need.

A very useful, almost necessary, item is an external mic for electronic tuners. Electronic tuners can be confused by extraneous sounds and vibrations in the room. The closer you can get to the string the better your results. For any Korg tuner the easy choice is the excellent Korg CM-100L Clip On Contact Microphone For Tuners. The CM-100L is a microphone on a wired clip with which you can get very close to the string you are tuning. Clip it to the metal framework near the octave you'll be tuning (not directly the string.) I got by without it at first, but it is worth the few extra dollars. This model will work on any Korg chromatic tuner. The CM-100L has a standard quarter-inch (6.35 mm) TRS phone jack plug, and may be used on other tuners that accept a microphone, though it may need an adapter.

I prefer a dedicated, hardware tuning device to fussing with a software program, at least at my level, but software tuners exist. Note that with any software or app solution you may need an external mic for best results.

This is a very short treatment of electronic tuners. Visit The Chromatic Tuner Guide for more details.

Piano Tuning Mutes

These rubber wedges are only a dollar or two each. Assorted sizes come in handy. I use the ones with a wire handle most often. You'll want a variety of two to six rubber wedge mutes to get started. Several other kinds of mutes are available for muting whole ranges of strings and muting just the middle of three strings. See What To Do Next near the end of this tutorial below for information on more mutes.

Additional Tools

You may need a screwdriver to remove some of the cabinetry for the best access. You will also want a light source; you must see clearly what pin goes to what string. Piano interiors also accumulate a good bit of dust and cobwebs, particularly if they have not been regularly serviced; dust cloths and a vacuum can be helpful.

Where to Buy Piano Tuning Tools

I recommend PianoSupplies.com for most of the piano tuning equipment described in this tutorial. They are professionals who can assist you with questions about the proper tools for your particular piano. They sell kits as well as the individual items. Kits often include a pouch, which is nice. On the other hand, kits may include things you may not use (for me, that was tuning forks) or inferior quality levers, so shop carefully. Amazon partners also sell some piano tuning tools. Remember to shop for quality over price.

Chromatic tuners are available at good prices from Amazon.com. Amazon, of course, is also good for books; see piano tuning book recommendations in the What To Do Next section at the end of this tutorial.


Reality Check

Why tuners tell you not to try piano tuning

Now that we have our tools, lets take a deep breath before we start turning any pins. We need to understand our limitations and goals.

Tuning is more than turning pins. A "good" tuning is two different things: accurate (in tune) and stable (stays in tune). Professional piano tuners develop these subtle skills through years of practice, and strive to perfect them their entire career.

This page does not replace the professional piano tuner. The simplified approach here is for the curious piano owner, or those who want to touch up between professional tunings, or perhaps performers who need an emergency adjustment. I have even heard from people who had a piano so neglected that a professional piano tuner refused to tune it. This method might at least make it playable once more. But if you have something precious, a pro will do a better job. Even if you are serious about tuning and intend to learn more, the basic approach given here will be a good start to help you understand more in-depth sources.

The piano is a large and complex instrument. It can be quite a task to get all the keys in tune, and this gets worse the longer the piano has not been tuned. A piano that has been left untuned for a long time may not hold tune with a standard tuning and may need a "pitch-raise" (an extended tuning regimen requiring several passes tuning the entire piano until everything will finally stay in tune.) Beyond that, voicing and regulating the action may be required to restore the best tone. Some pianos will require repairs, like misaligned hammers or loose pins. Such things are beyond this page, but we have books and other resources to recommend.

Know the risks of piano tuning. Carelessness or inexperience can break strings, loosen or bend pins or cause other damage. Too many loose pins, for example, may render the piano practically un-tunable and too expensive to repair.

Read this entire tutorial! I occasionally receive remarks from professional tuners critical of this web site. Those remarks are welcome; I use them to improve the website. However, some seem to dismiss the site without reading it completely. On the other hand, I receive positive comments from professionals who understand my goals. (Check our Guestbook for reader comments.) Please read the entire website carefully to be certain you understand the details, risks and limitations of this simplified procedure.

I taught myself piano tuningon an old, student-quality piano, not a priceless Steinway. I don't think I'd risk anything expensive or precious until I had plenty of practice. Still, I am happy with my results. I think other piano owners can do the same. With disclaimers out of the way, let's begin.

Piano Tuning Procedure

Before you begin, clear the area of other humans. Turn off all other sources of sound, especially things that "hum." Lock the doors. Prop the piano wide open. You may need to remove some of the cabinet members; they are designed to be easily removed with no more than a screwdriver. Position your light source.

Hammer and wedge in position to tune a piano
In position to tune.
My piano has 2 strings per
key at this octave;
most pianos have 3.

Piano Tuning Step 1: Tune a single string from a single note in the middle octave.

The middle octave is "middle C" also called C4, upward to C5. Each piano key in this region strikes three strings on full-sized pianos (two on some reduced spinets like mine.)

  1. Pick one string to tune at a time; if three strings, start with the middle. Carefully find the pin that turns the string you want to tune.
  2. Place your foot on the sustain pedal to lift the dampers off the strings whenever placing or removing mutes. This will protect the felt of the dampers while you place mutes.
  3. Gently place the rubber wedges just firmly enough to stop the vibration of the other strings in the set, but not so tight that the string is unnecessarily deformed.
  4. While repeatedly striking the piano key FIRMLY, turn the pin with the tuning lever VERY SLIGHTLY until the electronic tuner shows that it's in tune.

The Korg CA-40 or OT-120 automatically detect the note you are trying to reach. If you are really off, it may show the wrong note, so make sure you know what you are looking for. The OT-120 can be set to listen for a specific pitch. Alternatively, the CA-40 or the OT-120 can also play the tone for you to match by ear. More about matching by ear in Step 2.

Important Details About the Tuning Process:

Piano Tuning Step 2: Match the remaining strings in the note to the one first tuned.

After the first string is tuned, it's time to match the other string or two in the set to the first; this is called "tuning the unisons."

  1. Move the mutes so that the first, tuned string and a second string are free, but the third, if present, is still dampened by a mute.
  2. Ignore the tuner; tune the unisons by ear.
  3. Put your wrench on the second string's pin. While repeatedly striking the key hard, turn the second pin until you can hear no more "beats"--that is, it sounds like one note, not two in disharmony.
  4. Repeat for the third string if necessary, with all rubber mutes removed.
Diagram of piano keys with octaves numbered and octave four colored in green

Repeat Piano Tuning Step 1 and Piano Tuning Step 2 for each in note from C4 to B4. When you have completed this first octave, you have "set the temperament." In Piano Tuning Step 3, you will use this first octave as your reference for the rest of the piano.

Tuning a piano note (104k mp3). Click to play.If you are not sure what to listen for, here is an mp3 (104k file) I recorded of a piano note being tuned. (Javascript Pop-up window.) In the recording, I start with an A4 that is in tune, then use the tuning lever to loosen one of the strings out of tune, then bring it back in tune again. Disclaimer: In order to demonstrate in this mp3, I have turned the pin much more than is healthy for the pin. Move your pins as little as possible to avoid loosening them.

Do not tune the unisons with the electronic tuner. It's all but impossible to get a match that way. Tuning the unisons by ear is the quintessential tuner skill; no electronic tuning device can replace it. For more on tuning unisons and handling the lever, see our blog.

Piano Tuning Step 3: Tune remaining notes by comparing octaves.

When you have tuned all the strings in the middle octave, you have set the temperament. You will now use this middle octave, not the electronic chromatic tuner, as the reference for the rest of the piano.

  1. Do not use the electronic tuner.
  2. Tune the octaves above and below the middle by ear, matching them to the middle octave, e.g, A4 to A5, B4 to B5, etc. Tune one string in the note at a time (muting the others)--this time comparing it to the corresponding note in the middle octave rather than the electronic tuner.
  3. Then tune the other string(s) (that is, the unisons) within the note to the first as described above.
  4. Work your way outward, octave by octave (e.g., A5 to A6, then A6 to A7, etc.)

Hit both a reference and the key being tuned at the same time with one hand while using the lever with the other. Since the hand only spreads one octave, this presents the risk that an error or a pin that slips can be carried on, so frequently compare to the temperament octave and already-tuned octaves as you go. As you get to the extreme high and low octaves, it becomes harder to hear precise differences between the reference and the target. If in doubt, err on the sharp side for upper octaves, and on the flat side for lower octaves for the best sound (see "Finer Points" below.)

Similar to unisons, the exact order of progression of key to key is up to you, but its best to keep to a pattern so as not to miss anything. Furthermore, many tuners alternate between high and low octaves to keep tension on the soundboard equalized and your work stable.

What if I just want to tune A2 or B6 or something?

Tune the corresponding note (e.g. A4 or B4) in the middle octave to use as a reference. Note: if you have an electronic tuner that can show frequencies or play reference tones for octaves other than the middle octave, do not use it to tune anything but the middle octave. If you use the A2, for example, on an electronic tuner that is not specially designed for piano tuning, you will not get a good result because of "inharmonicity."

Why not use the Korg tuner to tune all the notes directly?

Even if you tune every note perfectly with a simple electronic tuner like a Korg, you will not get a very pleasing result. The different lengths and types of strings in a real piano tend to alter their resonant characteristics from the ideal. Tuners call this phenomenon "inharmonicity." The mathematically-calculated equal-temperament pitch actually sounds out of tune for many keys, getting worse the further you are from the middle, and more so on smaller pianos with shorter strings. In a piano that has been entirely tuned with a simple electronic tuner like the Korg, the top registers will sound flat, and the bottom registers sharp. In practice, only A4 (A above middle C) is tuned to a outside standard pitch, 440 Hz; all the other keys are tuned relative to A4. In fact, a purely aural (by ear) piano tuner may just tune the "A" with a tuning fork and tune the rest of the piano by ear.

In our simplified method of piano tuning, using a simple electronic tuner to tune the temperament, then putting it aside to tune octaves by ear will get you closer to proper adjustment automatically because it will "sound right." This more closely approaches what a professional piano tuner who tunes by ear does. See "Stretching Octaves" below. If you desire an electronic tuner to tune every octave, then you will need a professional piano tuner's electronic tuner or software like TuneLab, though professional tuners using these devices will make further adjustments.

Finer Points of Piano Tuning

Piano Stretch Chart by Brian Tung, from Wikipedia
Chart by Brian Tung, GNU Free Documentation License

Common Piano Tuning Questions

How do you keep a piano from getting out of tune? The primary strategy is to keep the environmental conditions as consistent as possible. Minimize changes in temperature and humidity; avoid placement near sunlight, windows, heating ducts, etc. After that, the best way to keep your piano in tune is to (surprise!) tune your piano. Once the piano is in tune, it is easier to keep it in tune with touch-ups and regularly-scheduled tunings. Don't wait until you can't stand the sound anymore. The more strings left untuned, the more the tension changes on the soundboard, causing a cascade effect where more and more strings to go out of tune. The typical recommendation is to do a complete tuning twice a year, shortly after the heating and cooling seasons begin.

What is missing in this piano tuning technique that a professional tuner would do? Listening is only half the equation. The other half of a tuner's expertise is moving the lever with precision so that the tuning is accurate and remains stable. Both listening and lever-work require training, study and practice--perhaps a hundred pianos-worth of practice. In this tutorial we compensate for the listening somewhat by using the electronic tuner, but we cannot replace experience, especially experience handling the lever.

Another significant part of traditional aural tuning we skip is tuning within an octave using fifths (e.g., A to D), fourths and other intervals. This requires counting "beats," that is the loud points in the vibrations that two dissonant strings make. (Remember that when tuning the two strings of a single note, for example, you match them so the beats disappear entirely.)

In addition, a professional will know how to stretch the octaves for the best sound. A professional will be less likely to loosen pins or break strings. They may also make repairs, regulate (adjust the mechanical action of the hammers) and voice (service the wool pads on the hammers).

For more questions and answers about piano tuning, visit our Piano Tuning FAQ

What To Do Next

More Piano Tuning Tools

The lever, a simple chromatic tuner, and a few wedge mutes are all you need to get started, but several additional items that can make tuning easier or even begin to take you beyond tuning.

Korg CM-100LAn External or Contact Microphone, like the Korg CM-100L Clip On Contact Microphone For Tuners mentioned above, is really handy for isolating sound and reducing the need to move the tuner itself around.
Korg OT-120 A Better Tuner, also as mentioned above, is also something to consider. We like the Korg OT-120 for its needle for piano tuning, but it also has many other features that make it good for tuning other instruments. Another possibility is a Strobe Tuner. Strobe tuners are generally more expensive than basic LCD-needle tuners, but many find a strobe display easier to tune to. However, the strobe display does not indicate cents as clearly as the needle, and professional piano tuners like to see how many cents things are off tune. Professional electronic tuning devices such as the Peterson AutoStrobe 490 Strobe Tuner usually have a strobe display, but they also show cents somehow. The least expensive professional quality electronic piano tuner is the app TuneLab. See our Chromatic Tuner Guide for more information on electronic chromatic tuners.
Temperament strip placed for tuning the temperament octave on a piano

Temperament strip in position.
This particular piano has only two strings per note in the temperament octave; the strip is muting one string on every note to leave the other strings free for tuning. Most pianos have three; the strip will mute two strings for each note.

More Mutes! Can't go wrong with a few more mutes of various sizes.One mute that piano tuners find essential, but we have not used in our tutorial for simplicity sake, is the temperament strip. The temperament strip is a long strip of wool felt with which you can mute many strings at once. It is used to mute all the outside strings of a section of notes so that only one string from each note can vibrate at a time. Push it between strings with a screw driver. That way you can efficiently tune one string in each note without having to move rubber wedges every time you change notes. After tuning all the single strings, tune the unisons by selectively pulling the temperament strip out or using wedges. Place it once, and tune the entire octave! This is actually the "professional" procedure, especially for setting the temperament (hence the name), though each tuner has preferences for when to use what mute. We start with rubber mutes in this tutorial because it is one less layer of complication for the beginner.

The long mute pictured in the kit is a treble mute, which can be used to mute the middle string of a three-string "treble." It can also be used to mute one or two strings quickly without placing wedges or using a finger. Handy for spot checking.

Treble Mute
Treble Mute for muting the middle string in a triad; several types are available; Papp's tweezer-style pictured.

If you would like to try repairs, you'll need additional tools, such as this basic regulation tool kit. Piano wire, key tops and other parts and accessories are also available. Repairs and restoration are beyond the scope of this website.

Piano Tuning Books and Links

Our tutorial presents an effective but very simplified approach to piano tuning; much more remains to be learned. As we say in our introduction, it's hard to find good explanations for the beginner; if you understand what I have presented first, you'll find these other sources easier to follow. Several piano tuning books that are among the most highly-regarded resources in the field include the following.

Piano Tuning by ReblitzPiano Servicing, Tuning, and Rebuilding, Second Edition : for the Professional, the Student, and the Hobbyist by Arthur A. Reblitz. The "bible" of introductory tuning texts. "All the information essential to the art of restoring and maintaining a piano; from minor repairs and cleaning to major tuning and complete restoration techniques." It has excellent reviews. Browse inside the book and read the reviews at Amazon.
Piano Tuning: A Simple and Accurate Method for Amateurs by J. Cree FischerPiano Tuning: A Simple and Accurate Method for Amateurs by J. Cree Fischer. Here's a classic piano tuning text, recommended to me by a reader of this page. Written in 1907, so some of the information is outmoded (particularly the square piano and math sections), but his method of piano tuning works today. His technique of aural tuning uses a relatively simple strategy of tuning only fifths and octaves. It's out of copyright and also available as a free ebook. We have recently posted a simple outline of Fischer's piano tuning method in our new blog.
The Piano Book: Buying & Owning a New or Used Piano by Larry FineThe Piano Book: Buying and Owning a New or Used Piano by Larry Fine. Not really a tuning book, but rather an excellent reference for the instrument in general. If you care enough about your piano to tune it, you really should learn as much as you can about owning it first.
Complete Course in Professional Piano Tuning: Repair and Rebuilding by Floyd A. StevensComplete Course in Professional Piano Tuning: Repair and Rebuilding by Floyd A Stevens. This text for those really serious about piano tuning, but it is still readable for those without prior experience in tuning.
For more piano tuning books, from simple guides to professional textbooks, check our Amazon Listmania.

Piano Tuning Links

For more questions and answers about piano tuning, see our Piano Tuning FAQ page.
For more photographs of our piano tuning, see our other site, Tuning Your Piano Pictorial.

Chuan C. Chang's book.
Chapter 1 teaches a method for learning to play the piano, but Chapter 2 is about tuning.

McCullough Tuning Tutorial
More details on tuning by ear.

Precision Strobe's Tuning Page
All the technical details behind piano tuning. Not for the faint of heart!

More Select Piano Links
More links to content-rich websites with piano information for the do-it-yourself piano owner and player, gathered and reviewed by me.

The Chromatic Tuner Guide
While an electronic tuner seems like a straightforward device, you'd be amazed at what they can do. A comprehensive guide to electronic tuners.

Comment accorder un piano vous-même
Traduction Française de cette page

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