# What Is a Pitch Raise? Tuning a Neglected Piano | Keys & Co. > What a piano pitch raise is and why a long-untuned piano needs one, what concert pitch means, the multi-stage process, and what to expect. URL: https://keysandcopiano.co.uk/guide/what-is-a-pitch-raise/ Last-Modified: 2026-05-22 Guides # What Is a Pitch Raise? Tuning a Neglected Piano What a piano pitch raise is and why a long-untuned piano needs one, what concert pitch means, the multi-stage process, and what to expect. schedule Published 22 May 2026 · 4 min read ![A technician working across the strings of a long-neglected piano](/images/featured/technician-carefully-working-across-the-strings-of.webp) We regularly meet clients who wonder if a piano pitch raise is just an unnecessary upsell. That skepticism is completely understandable. Forcing an 18-tonne tension system straight back to concert pitch in one go simply causes the strings to slip immediately. Our team created this guide to break down exactly why tuning a neglected piano requires this preliminary tension adjustment. The strings will immediately slip back out of tune without this crucial first step. To book a visit, see our tuning and maintenance service [/piano-tuning/ →](/piano-tuning/) . ![Detail of piano strings and tuning pins mid-adjustment](/images/content/detail-of-piano-strings-and-tuning-pins-mid-adjust.webp) ## When a Standard Tuning Is Not Enough We always tell clients that a standard tuning falls short when an instrument has dropped significantly below its intended frequency. The piano requires an initial, rough tension adjustment before any delicate work can actually hold. A neglected instrument that has fallen more than three cents flat will need this intensive preliminary step, a threshold widely recognized by professional technicians. Our technicians see this frequently in British homes where winter central heating creates dramatic humidity swings. These dry conditions cause the wooden soundboard to shrink, which slackens the strings and pulls the entire pitch flat. The physical structure of the instrument simply settles into a relaxed state over time. We suggest looking out for a few specific warning signs before booking a service. Common indicators that your instrument needs more than a standard visit include: - The piano has not been serviced in over two years. - It recently moved from a damp storage unit into a heated room. - Playing simple chords sounds noticeably muddy or sour. - The keys feel sluggish or unresponsive. ## What a Pitch Raise Is We answer the question of what a pitch raise is by describing it as a coarse, preliminary tuning designed to rapidly increase the tension of a neglected instrument. Its job is to bring a piano that has dropped well below pitch back up toward its correct frequency so that a normal fine-tuning can be carried out. This process acts as the heavy lifting before the precise musical adjustments take place. Our standard practice involves pulling the string tension slightly sharp, knowing it will immediately begin to relax and drop. A severe pitch drop means the technician must systematically overpull each of the 230-plus steel strings found in a typical acoustic piano. | Feature | Standard Tuning | Pitch Raise | | --- | --- | --- | | Primary Goal | Precise musical accuracy | Rapid tension adjustment | | Average Duration | 1 hour | 1.5 to 2 hours | | Target Condition | Maintained annually | Neglected for 2+ years | | Technique | Micro-adjustments | Intentional overpulling | This aggressive adjustment forces the iron frame and wooden back to acclimatise to the correct pressure. We find it helpful to compare the process to stretching a brand-new elastic band. The rubber needs a firm, initial stretch to remove the slack before it will hold a specific length. A badly flat piano responds in the exact same way, requiring this rough pass before the final polish. ## What Years Without Tuning Do We must emphasise that years without tuning cause a piano to lose an enormous amount of physical tension across its strings. The entire instrument settles flat as this pressure slowly eases, drifting further below concert pitch with each passing season. The cumulative tension required to keep a piano at pitch is staggering, often equaling the weight of several vehicles. Our measurements, along with data from UK piano manufacturers, show that the average British upright or grand piano holds between 18 and 20 tonnes of tension across its frame. The heavy cast-iron plate inside the casing exists specifically to withstand this massive pulling force. When an instrument sits untouched for a decade, that 20-tonne grip gradually slackens, string by string. We often encounter pre-1950s models in the UK that have lost so much tension they risk structural failure if pulled up too quickly, a common warning shared by restoration experts. The longer the tuning pins sit in a relaxed state, the further down the frequency falls. The resulting sound becomes dull, lifeless, and entirely out of step with the rest of the musical world. > **The Danger of a Single Pass** Pulling an 18-tonne tension system up to pitch in one single go causes a massive structural shock. The soundboard flexes under the sudden pressure, causing the strings you just tuned to immediately go flat again. Gradual stages are the only safe, stable path forward. ## What Concert Pitch Means We tune most instruments to concert pitch, which is the agreed international standard setting the A note above middle C to exactly 440 hertz. This frequency, commonly written as A440, ensures that different instruments can play together in perfect harmony. The standard was formally adopted by the British Standards Institution in 1939 and later cemented globally as the ISO 16 standard in 1955. Our team uses A440 because it trains a learner’s ear to hear notes correctly and consistently. A piano that has sagged well below this 440 Hz mark sounds dull and makes playing along with modern recordings impossible. Pianos left at lower frequencies cannot be used for vocal accompaniment or ensemble performances. We do occasionally encounter older, antique pianos that simply cannot handle the 18-tonne strain of modern A440 tuning. For these fragile instruments, technicians sometimes have to tune the piano to itself at a lower pitch to prevent the strings from snapping. The instrument will sound pleasant on its own, but it will never perfectly match a digital keyboard or a recorded track. Concert pitch matters for three distinct reasons: - It makes playing alongside singers and other acoustic instruments possible. - It matches the tuning used on commercial music recordings. - It develops proper pitch recognition for young students taking music exams. ## The Multi-Stage Process We execute a pitch raise in carefully calculated stages to protect the instrument and ensure tuning stability. The technician brings the whole instrument up part of the way, allows the tension to settle, and then performs a second pass. This multi-stage approach prevents the massive 18-to-20-tonne pressure increase from warping the wooden soundboard. Our standard method involves an overpull, where the bass section is raised slightly sharp and the treble is pushed 8 to 15 cents higher than the target. The strings naturally relax and drop down from this sharp position, landing perfectly at the correct A440 frequency. A traditional fine-tuning always follows this aggressive adjustment to make every individual unison precise. We sometimes split this work across two separate visits spaced a few weeks apart for severely neglected pianos. This waiting period gives the wood and metal ample time to acclimatise to the new, intense forces pulling on them. The exact number of passes depends entirely on how far the instrument has fallen and how the tuning pins respond. Here is the step-by-step breakdown of the recovery operation: 1. **Assessment:** Measuring exactly how many cents flat the middle section has become. 2. **The Coarse Overpull:** Rapidly tightening all 230 strings in about 45 minutes to establish a new tension baseline. 3. **The Fine-Tuning:** Carefully aligning the unisons and octaves so the instrument sounds musical again. ## What to Expect We will always tell you in advance if your piano needs a pitch raise, explaining the exact reasons, time, and costs involved. There are never any surprises when the invoice arrives. A typical recovery adds about 50 percent to the cost of a standard tuning because of the extra physical labour required. Our clients find the reassuring part is the final outcome. A pitch raise followed by a fine-tuning brings a tired, flat piano back to concert pitch and back to life. The muddy chords disappear, replaced by a bright, resonant tone that fills the room. We highly recommend booking regular six-month check-ups to maintain this newly established stability. Regular servicing keeps the tension locked in, preventing the need for another expensive overpull in the future. The comprehensive guide we published on how often a piano should be tuned [/guide/how-often-should-a-piano-be-tuned/ →](/guide/how-often-should-a-piano-be-tuned/) explains exactly how to keep it that way. Good to Know ## Common Questions What is a pitch raise? expand\_more A pitch raise is a coarse first tuning that brings a badly flat piano back up toward concert pitch, so that a normal fine tuning can then be carried out and will hold. Why can't a neglected piano just be tuned once? expand\_more Raising the tension of every string at once is unstable, and the piano would simply slip again. The work is done in stages so the instrument can settle between them. Will a pitch raise fix my old piano? expand\_more A pitch raise brings the piano back to pitch. A follow-up fine tuning then stabilises it. Together they restore a neglected piano so it holds its tune properly. Keep Reading ## Related Guides ### How UK Humidity Affects Your Piano (and How to Protect It) How humidity swings affect a piano's soundboard and tuning stability, the risks in older North Yorkshire homes, and practical ways to protect your instrument. Read guide arrow\_forward [How UK Humidity Affects Your Piano (and How to Protect It) →](/guide/how-humidity-affects-your-piano/) ### How Often Should a Piano Be Tuned? How often a piano should be tuned at home and in institutions, why new pianos need tuning more often at first, and the cost of leaving it too long. Read guide arrow\_forward [How Often Should a Piano Be Tuned? →](/guide/how-often-should-a-piano-be-tuned/) piano ## Ready to talk it through in person? Visit our relaxed Harrogate showroom and let a qualified technician help you find the right piano. No rush, no pressure. Book a Showroom Visit [/contact/ →](/contact/) Explore Piano Tuning & Maintenance [/piano-tuning/ →](/piano-tuning/)