So here’s the description of the dog tag : We know the power and effects our words can have on the world around us. Our voice and the way we speak helps define the interactions we have in the world around us. Our emotional states also affects the way we speak, like when angry, we get louder and harsher in tone. (This response is usually to try to dominate a situation, you can expect during an argument each person trying to shout progressive louder to out do the other) What this does when worn is infuse the words you speak with unconditional love and positive energy, which in turn can create a very positive environment around you. No doubt this can be a very welcome effect on the world around you, people may pay attention to you more, choose to interact in a kinder more loving way, In fact a lot may linger on your every word. This can be an incredible thing for those who work with animals, sing or even speak publicly. The one draw back is that it may be harder to lies or in a negative manner with it.
That is wonderful, just imagine spreading love and positives energies anytime you are talking or singing. 
But as a singer, what I wanted to know is that if my voice is recorded will the effects will be still present in the audio too ? Does anyone knows ?
Yeah, it infuses your voice with unconditional love and positive energy. Like it should automate/guide your tone basically, (in how you speak or sing) so if your voice is recorded loud or clear enough, than yeah.