You might be referring to a quote from Paul Stamets. I am not an expert, so here's my anecdotal take on it: when I drink alcohol, my mild tinitus completely fades away. I'm highly suspecting it has something to do with lowering blood pressure. Psylocybine is also known to affect blood pressure, (both rising and lowering). Then again, so is trying to relax. Being a micro doser myself, I have become very sceptical about the psylocybine craze lately. It's being advocated as a panacea, which it's obviously not. I know you are referring to an anecdote, but it's not far off from what I've seen being pushed by these so called 'institutions' without any substantial evidence. The quackery going on is pretty worrysome and will end up damaging the image of psylocybine yet again, imho.