Tuning fork is a tool that is shaped like a two-pronged fork (or in the form of the letter y) and resonates at a certain frequency when struck on an object. The Qur'an is a tool that we use to get inner peace, we only need the Koran. When you are understanding the science of this tuning fork, finally we don't need anything else, what we need is a very strong vibration from the universe that Allah entrusted namely Al Quran to be an inner strength for us Al Quran is a tuning fork energy that Allah left in the face of the earth.