Why was Sai Baba's voice so impactful for Kaka Mahajani's skeptical friend?

The impact of Sai Baba's voice on Kaka Mahajani's friend was profound and served as the catalyst for his transformation. Chapter 35 explains that as the friend set foot on the mosque's step, Baba called out, "Why have you come in this manner?" Hearing this, the friend was astonished because the charming tone of Baba's voice was a perfect imitation of his deceased father's exact vocal style. He marveled at the "magic power" in that speech, feeling it was certainly a familiar voice. This deeply personal and inexplicable experience caused him to melt inside and abandon the skepticism he had arrived with, leading him to bow at Baba's feet.