Non-verbal use of the voice as a musical instrument. Language can limit the use of the voice since words are connected to thought and the mind and culture, etc etc etc...
I have a language that only Krishna and myself can understand. There are no words. I feel it is a great gift and we can talk to each other for hours on end in this unique language. No one else can understand.
It is very intimate. The mind cannot figure it out and gives up trying and simply sits back and enjoys taking a break.
This has been given to me by a great friend. My intelligence.
The chanting of the mantra then becomes very clear and sweet and intense.
Communicating in sound without the use of words and language. There are no limitations. Krishna is the Primeval Lord and this is a primeval language.
Primeval: (of feelings or actions) based on primitive instinct; raw and elementary.

https://www.youtube.com/watch?v=g-C7Hd-HDpI&t=2s