In and of itself, a piano is an expensive purchase and it should be well taken care of. Part of taking care of a piano consists of tuning it and just that alone is a daunting task because it takes a lot of patience and knowledge.
It is recommended to hire a professional for the job since they know how to tune a piano and certain things are needed to do the job correctly. The four important tools needed are light for better viewing, an electric tuner, a mute and a tuning wrench. These are not your average tools from a tool box, but a professional pianist tuner would have these tools and more.
The piano will need to be taken apart, and this is where the light or flashlight would come into play. The process of tuning a piano requires that the strings be lengthened or shortened. These strings are connected to each individual key of the piano.
Inside the piano there will be strings as previously mentioned. Find the knobs because this is how you will begin your tuning. Each tuning affects the pitch, so depending on how loose or tight the piano is tuned will give off a different sound. As a result, depending on the pitch sought after, the knobs will be turned either left or right.
Next, it is time to actually tune the piano. The best thing to have here is an electric tuner. This device will be a lifesaver because, while it does not tell you how to tune a piano, it does a great job at detecting the pitch. If the pitch is off after tuning, it will profoundly affect the sound of your piano. If that's the case, continue to turn the knobs as necessary until you find the right pitch.
As you are tuning the keys of the piano, please be aware that you are dealing with an exquisite item, and strict care must be used. The strings can crack, or pop, and that would not be a good thing. Now that you have learned how to tune a piano and you know all the work it involves, it is well advised to have a professional do it. That being said, if you're going to do it yourself, go slowly and be patient.