Tuning Inquiries

I specialise in tuning and servicing for these best-known makes:

  • Bechstein
  • Blüthner
  • Bösendorfer
  • Ed. Seiler
  • Fazioli
  • Feurich
  • Förster
  • Kawai
  • Sauter
  • Schimmel
  • Steinway
  • Yamaha

These are the pianos for which I have specialist knowledge and access to replacement parts where needed.

I will consider other makes on their individual merits, based on the detail in your inquiry, but please note:

I'm unlikely to consider pianos of unknown, lost, or incomplete history, pre-war English makes, 'starter pianos' (typically auction wins of £500 or less), or locations substantially beyond my Southwest London / Surrey base.

Please ensure that you have the following information to hand when you contact me, preferably by email. If you decide to call me please be prepared to leave a voicemail.

In this way you will be assured that I am already up to speed when we speak.

This is what I need to know:

Then email Tim Hendy.

If you feel it necessary to telephone, then please call 07976 210140, and do be prepared to leave a message - thank you.

Recent Google Reviews

Tim has tuned both of our pianos on a few occasions now. He recently tuned our baby grand to concert pitch and has recently voiced our second piano to tone the brightness down. He is clearly knowledgeable and passionate about what he does and his meticulous attention to detail enables the best possible outcome. It is always a pleasure to have Tim in our home as he is immensely courteous. I am so happy to have found him and would highly recommend him.


Tim worked some magic on our Yamaha upright which hadn't been tuned in approximately 20 years. Luckily nothing needed replacing and, in his allotted time, brought it completely back to life. He is clearly extremely good at this particular job with decades of experience at the highest level. We look forward to seeing him again for a second round of tunning. Would recommend to all.


Tim has been tuning our piano for over 10 with care, expertise and courtesy. I'd recommend him without reservation.


More Google Reviews

Tuning Feature: Equal Temperament

The only way to tune a piano perfectly is to tune it precisely imperfectly, i.e. by equal temperament.

J. S. Bach championed the cause by demonstrating it practically, in his astonishing Well-Tempered Clavier, known as ‘The 48’.

The Well-Tempered Clavier, BWV 846–893, is a collection of two series of Preludes and Fugues in all 24 major and minor keys, composed for solo keyboard by Johann Sebastian Bach. In the German of Bach's time Clavier (keyboard) was a generic name indicating a variety of keyboard instruments, most typically a harpsichord or clavichord – but not excluding an organ either.

Wikipedia, The Well-Tempered Clavier

Sepia-coloured manuscript, three staves with notation in Bach's handwriting

Early version of Prelude No. 1 in C major from The Well-Tempered Clavier, Volume 1, by Johann Sebastian Bach. This version is from the Klavierbüchlein für Wilhelm Friedemann Bach.

The greatest musical big bang ever

Number is the ruler of forms and ideas, and the cause of gods and daemons.

As quoted in Life of Pythagoras (c. 300) by Iamblichus of Chalcis, as translated by Thomas Taylor (1818)

Pythagoras coinThe employment of a musical scale of twelve equal divisions between the octave is taken for granted, but the theory behind this greatest of musical big bangs is truly marvellous. Pythagoras decided one day to stack twelve perfect fifths on top of each other - try it on your piano - you get from bottom A to top A. He found, to his great interest no doubt, that although the fifths were pure (in fact, it was because of this), top A was sharp to the bottom by a quarter of a tone. Apply this to twelve divisions between the octaves, and you find that the only way to create equal frequency gaps between the semitones is by multiplying frequencies by the twelfth root of two.

the seal of J. S. Bach This gives Equal Temperament, allowing us to move freely around all of the keys, major and minor, without having to alter the tuning. J. S. Bach championed the cause by demonstrating it practically, in his astonishing Well-Tempered Clavier, known as ‘The 48’. Bach knew that without this innovation, keyboards could only play in a small selection of keys, for a given tuning; these tunings, called Temperaments, were also known as Mean-Tone tuning. There were many different temperaments, and therefore the performer had to be sure to use the temperament the composer specified for a particular performance. The late adoption of equal temperament in the UK (late-1800s!) hampered the development of music generally here, allowing Germany a massive leap forward, and between the years of Purcell and Britten, Britain became known as the music-less land.

Maths: the Semitone Multiplier

the 12 root of 2

To demonstrate, try this: enter 220 into your calculator (220Hz is the frequency of the A below middle C on your piano, when correctly tuned). Multiply this by 1.059463, and each subsequent product, by this number (the Semitone Multiplier) eleven more times times, and you arrive at 439.99944 - i.e. A=440, as near as mathematics allow. This not only gives you the octave, but twelve divisions equally spaced in between. So you see, the Greeks not only invented democracy in government, but also a democratically-aligned system of tuning - over two thousand years before the great J. S. Bach was able to demonstrate the principle so forcefully in his monumental 48.

Tim Hendy tuning a piano at Shepperton Studios, LondonThe skill of the accomplished piano tuner is to be able to practically apply such precise theory to pianos as esoteric and diverse as, for example, Mrs Smith’s old Cottage Upright piano from the 1890s, perhaps untuned in the last ten years, or the majestic Steinway concert grand Model D on the concert platform.

What fun!

Bring me a bowl of coffee before I turn into a goat.

Johann Sebastian Bach

Oh no! Another overdamper!!!

Tim Hendy, as quoted, with sadness, on a more-or-less weekly basis

More: Wikipedia on Equal Temperament

Piano score, J. S. Bach, The Well Tempered Clavier, Book 1, Prelude 1, Opening

J. S. Bach, The Well Tempered Clavier, Book 1, Prelude 1, Opening

Tzvi Erez plays Bach: Prelude 1 in C Major BWV 846 from the Well-Tempered Clavier

First-class piano tuning, maintenance and repair services in

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