Altered states of consciousness induced by breathwork accompanied by music

The last time this topic was on HN, some mentioned that many indigenous people had similar techniques with drum beats, e.g. https://www.youtube.com/watch?v=bIfLC5iudQ0 (this is a modern rendition though).

Somewhat related you may want to check out the works of Manvir Singh [1]. He is an anthropologist who has done extensive work in Shamanism, even authored a book.

A necessary condition to be a shaman is to enter altered sensory state and Shamanism is prevalent among indigenous peoples across the world.

[1] https://www.manvir.org/