Music is already an ASC and cannot be unheard going deep in us...
Playing with sound parameters in a room imply an ASC...
Do you know the Barabar site in India ?
Nobody knows who did it, the precision is impossible to replicate today, and the caves were probably used as an acoustic tool to create ASC...
This stunning documentary is one of the best i had seen recently and say a lot :
BARABAR, THE ARCHAEOLOGICAL SITE OF THE FUTURE
This 2 hours is amazing
https://www.youtube.com/watch?v=iF6qv1CC5_4&t=3s
But if you want a short introduction :
https://www.youtube.com/watch?v=4nGnA0ZrwEk