The ancient wisdom was in closer connection to the understanding that we are more vibration than we are matter. Meaning, there is more space and movement inside us vs static form or material.
Based on this knowledge, music and mantra's were used as tuning forks that doubled down as acupressure medicine. In the body there are energy highways, and on these highways there are specific points that are used to manage qi or energy flow. There are 84 points in the mouth that are stimulated by the tongue.
The rhythm of the sounds are as important as the pronunciation, and projection or volume that resonates in the body are the three keys elements. What ever you sing the most is what you are tuning your reality to become...its the vibration you are choosing to be.
The song matters my friend