Or at least it doesn’t have any meaning, really. What’s happening here is that somebody arbitrarily assigned musical tones to some bio-electrical processes, and this is what came out when you hook mushrooms up. But, yeah, it sounds like you’d expect:
Via @TulpaHivemind.
TIL that the phrase “blue oyster” was not just some nonsense phrase made up by members of Blue Oyster Cult.