The "soul" state and existence is not the matter of this thread about music then i will not go further on this...
I will only add this :
Before any instrument perhaps with the exclusion of percussive objects, the voice gesture amplifying or resonating with the gesturing body is the simultaneous beginnings of speech as we understand it and of music.
The depth of the spiritual expressive content of music is, as in the articles above together demonstrated, in the relation between the vibrating sound sources timbre (instrument+musician voice and body gestures) and the non measurable+measurable time dimensions of the expressive gestures act connected to the social group and Nature...
No instituted religion is needed in the beginings why ?
Because the Nature soul as the soul of the group and of each individual is one mimesis phenomenon, where hunting, praying, dancing, speaking-singing, eating or dreaming are one activity...Meanings is not mere information but a cosmic event cascading in the Group which perceive the synchronicities as meaningful events...
We can see it nowadays degraded in crowd hysteria and lynching festival...
We are "civilized" : we begin to loose our individualities in the mass control experiment call A.I. technology and other "progress" sponsored by mad uneducated oligarchs... But it is like the "soul" alleged non existence for programmed mind another matter for another forum...