Religions are like musical instruments. To be played together in an orchestra, they must be tuned to the right tone or pitch. The first requirement is the desire to be in tune with the other instruments. The second one is to find a common reference or tone, usually given by the oboe that plays a fixed pitch (A = 440 Hz). Then all other instruments will be adjusted according to this common pitch using different methods because of the different ways in which sounds are produced. The task of interreligious dialogue, using this analogy, is to find that common reference or pitch that allow all religions to play together in peace and harmony. I found that the first requirement for tuning our religions is already present. Several important documents such as Nostra Aetate and A Common Word between Us and You are signs of a real desire for falling in the right pitch. However, religions are still searching for the second requirement, the pitch to which the whole orchestra will be tuned. This study hopes to contribute to this search by presenting a common pitch to which religions can tune themselves to build harmonious relations with each other, i.e., a common base for interreligious dialogue.