"spiritual depth" is not a religious experience linked to a piece of religious music for me...
This is a common place Lapalissade association by superficial look...
"spiritual depth" in music is linked to the " felt change of consciousness" Owen Barfield defined and associated with the way words/sounds/rythms are used in poetry...In the same way musicians can use music language of their culture and timbre mastery to create real "spiritual experiences" not just "fun" or a designed orthodox religious celebration.
"visceral" on the other way refer back to the property of music to speak trough the "timbre experience" which is a universal experience lived trough our body sensation nevermind the differences of culture...
you read it here :
Bodily maps of musical sensations across cultures
https://www.pnas.org/doi/10.1073/pnas.2308859121
Timbral effects on consonance disentangle psychoacoustic mechanisms and suggest perceptual origins for musical scales:
https://www.nature.com/articles/s41467-024-45812-z
The reason why this is such is explained by this acoustician in his book here an article :
The Mechanical Invariance Factor in Musical Acoustics and Perception (Revisited)
https://sciencepublishinggroup.com/article/10.11648/10026300
This article can help to understand all the others above :
«Building on the current results, the researchers are now investigating how human hearing is more finely tuned toward natural sounds, and also studying the temporal factor in hearing.»
I insisted on "musical time" so much in this thread the reason is explained here in the lastarticle under these lines and why musical time cannot be measured by linear clock...Furtwangler knew it in a way Toscanini did not...(Gergiev Russian maestro)
Human hearing beats the Fourier uncertainty principle
https://phys.org/news/2013-02-human-fourier-uncertainty-principle.html

