I tune all types of pianos and occasionally harpsichords. Most of my work is restricted to upright and grand pianos.
The temperament I use is Equal Temperament. This is standard, although it is possible, particularly with the use of modern technology, to tune your piano to an historic temperament. Where possible, I tune to the international standard A440 Hertz. This was set in 1939 at an international conference held in London. In all cases an assessment has to be made as to whether your piano will tune to A440, but I make every effort to raise your piano to this pitch. Whilst tuning I will also assess your piano for any repairs or adjustments that may be necessary. Many minor adjustments can be made on tuning, but more extensive work will be advised upon as the situation arises.
With the advances of computer technology, I now use to assist in tuning your piano. I trained to tune aurally whilst I was at college between 1984-87. This training has stood me in good stead. Professional software alone is not enough. As with most things, there is more to tuning pianos than meets the eye,(or ear!) Good unisons and setting the pin still requires training and years of experience.