Mantras are only endowed with transformative power if presented in initiation (dīkṣa) from the mouth of a guru. It's not necessarily so much appropriate pronunciation, but alternatively the power with which the mantra is endowed that gives it transforming functionality. A 2019 study released in the Journal of Scientific Psychology https://vashikaranspecialist44444.targetblogs.com/37464493/yantra-no-further-a-mystery