Actually the musical tuning fork is a piece of iron in the form of a fork. The length of time that it takes to tune a piano can vary greatly, due to the piano’s age and the conditions in which it lives. Physical Science Activity Measure the frequency and And keep changing the pitch of a4 until a4 and the fork sound like one. How to tune a piano with a tuning fork . It is very important to turn the pin very slowly as you may break the string because there is already a lot of pressure on it! Istrobosoft can be used to tune a piano but we use it to tune a4 accurately. The most basic way to tune a4 to the fork is play a4 and the fork together. In this way, it is so different from a violin, cello or guitar. If you can’t find any, use the note a half tone down or up; Learning how to tune a piano involves hands on education, text book studying and online quizzes. Then, while still holding the base of the tuning fork, gently touch the ball of the tuning fork to your violi...