Can you explain the powerful effect Sai Baba's voice had on Kaka Mahajani's skeptical friend?

The effect of Sai Baba's voice was profound and transformative for the friend. As recounted in Chapter 35, when the friend set foot in the mosque, Baba called out to him with the words, "Why have you come in this manner?" It wasn't just the words, but the specific tone and vocal style that stunned the man. He immediately recognized it as a perfect imitation of his deceased father's voice, describing it as "exactly my father's way of speaking." This auditory miracle, this "magic power" in Baba's speech, caused the friend to be amazed in his mind and melt inside. It shattered his skepticism and made him forget his firm resolve not to bow, leading him to prostrate at Baba's feet.