Ayahuasca is driven by sound, by song, by whistling. And its ability to transform sound, including vocal sound, into the visual spectrum indicates that some kind of information processing membrane or boundary is being overcome by the pharmacology of this stuff. And things normally experienced as acoustically experienced becomes visibly beheld, and it's quite spectacular.
Terence McKennaThere is no mundane dimension really, if you have the eyes to see it, it is all transcendental.
Terence McKenna