By far the most common procedure outside of fine tuning that a technician has to perform is a process called ‘pitch raising’. This is a special tuning where the pitch is brought up sharp of A440 and then allowed to settle into place. This is so common because pianos are constantly drifting flat, meaning their pitch is slowly lowering over time. If you haven’t had your piano tuned in a few years you can expect that it will need a pitch raise (in some extreme cases more than one) in addition to the regular tuning. A pitch raise generally leaves the tuning unstable and you may want to have the piano tuned again in about a week. Keep in mind if you have your piano tuned at least once a year you will not have to deal with it going flat and therefore needing the extra work.
Leaving it flat
Sometimes the technician will offer you the option to tune your piano normally but leave it flat. We call this “tuning the piano to itself”. This option forgoes the pitch raise and leaves the tuning more stable, but it will be a low pitch overall. It will still sound clean and in tune.
Some problems with leaving it flat are:
- It will be challenging to play along with other instruments
- It will sound somewhat ‘dark’ and have a less pleasing sound because the strings are not at their intended tension
- Considering the developing ears of students, they will not become accustomed to hearing the notes the way they are supposed to sound
Raising the pitch, while common, is not an ideal thing to have to do. It causes little imperfections in the strings and can actually bend and bow the cast iron plate. Strings may break in the process. In some cases the technician may recommend against raising the pitch if it doesn’t look like the piano can handle it. If you have your piano tuned at least once a year you will never have to deal with raising the pitch and you will ensure the value and tone of your piano for many years to come.