Can we chant mantra in mind during Pranav meditation?

Q : While doing Pranav dhyan when music is played, can we chant mantra in our mind?

A: Well, at the stage when the music is being played, at that time you should be silent, you have done enough chanting of Pranav in the initial stages. At this time do not chant any mantra; it is the time take a plunge from word to wordlessness.