I have heard many voices speak to me and tell me things while on mushrooms..and not always nice things I might add..something spice again has not yet done to me..
After many large dose mushroom trips with other people, I started to take lower doses(1-3 grams) sometimes late at night when I was tired before sleep and lay there all night tripping, in and out of light sleep. It gets extremely weird..I swear it's way deeper than just eating shrooms..I think that the psilio is boosted by all the melatonin and other sleep hormones pumping thorugh the brain..thats when i would hear the voices..and I would usually be halfway asleap sort of, and would "come to" in the middle of the dialogue...once I came to with a vision of 3 pixie like beings singing over and over this message about how the time was now to create new mythologies and stories for the new generation of the human race..I understood from them that our myths and stories are what shape our culture, and that we could change our realities simply by being storytellers...it was really magical, one of the trips I instantly think of when I think of my happy trips.. Another time I was sleeping on the beach and had eaten only like a gram or so and fallen asleap, i awoke in a sleep paralysis sort of state tripping and listening to this horrible voice telling me really bad things..but it stopped as I woke up out of it..
I would like to think that the beings are actaully out there, but it's also possible they are just my own inner voices..either way they usually seem to have something of worth to say so I listen but never fully embrace them..not at first anyway.
With spice I have never heard voices yet..but I have seen beings. Ayahuasca one spoke directly to me, kind of a one liner..but she was more than a voice..she was a beautiful woman..and it never happened again
..but I have wayyyy more mushroom experiences because I tripped more often back than, so my opinion may be a bit biased..I think there may be wayy more that spice has to offer when ingested..with the vine of course..I am kinda hoping that the voice phenomenon will manifest with bufo for me..I hear it's really good for auditory hullucinations and weird dreamlike scenes once one passes out.
edit..most of the mushroom trips I speak of were with psilocybe cyanescenes..
Long live the unwoke.