Many techniques achieve trance state though music. 

Indeed music can have a strong effect on our body, 

emotions and nervous system mainly because it can change our breathing pattern. 

This happens when the music resonate internally for several reasons. 

It could be related to our memories and familiarity, 

or to a particular frequency that would be more likely to trigger 

the sympathetic or parasympathetic nervous system, or automatic movement like a reflex .