Interestingly, people taking diisopropyltryptamine consistently report strong audio perception distortion: https://www.erowid.org/library/books_online/tihkal/t

Interestingly, people taking diisopropyltryptamine consistently report strong audio perception distortion: https://www.erowid.org/library/books_online/tihkal/tihkal04.shtml https://www.erowid.org/library/books_online/tihkal/tihkal04.... "Most psychedelic drugs affect, primarily, the visual sense, but here is one that shows its effects primarily in the auditory system. And it screws it up in a most unlinear manner, in that there in not just a simple decrease in pitch which would be as if someone had his thumb against the LP record and made everything come out at a 3/4 speed text, or a 1/2 speed text. Actual [p]roportionality is lost, so there is complete harmonic distortion."