On the newest episode of his podcast Under the Scales, Phish lyricist Tom Marshall welcomes a number of friends to delve into the mysteries behind the band’s recent Halloween performance, which featured a set of new original tunes disguised as covers of an obscure Scandinavian band from the ’80s, Kasvot Växt.

Joining Marshall on the podcast are Brian Brinkman, David Steinberg, Craig Hillwig, Jen Bernstein, RJ Bee, Stephen “Tebo” Thomas and Scott Gray, all of whom offer their own takes on different parts of Kasvot Växt’s í rokk album, plus their own guess as to what the acronym from “Say It to Me S.A.N.T.O.S.” might stand for. Marshall and the guests note that some fan guesses have included a statement about people bringing nitrous tanks to Phish show to a reference to Buffalo, NY weatherman Todd Santos (a possible nod to the band’s canceled Curveball festival).

Marshall admits that the only thing he knows for sure about the new songs is what S.A.N.T.O.S. officially stands for. After asking each of the band members to join him on Under the Scales (“In varying degrees of politeness, they said ‘no,'” Marshall says), the host reveals near the end of the episode that the acronym is a reference to Kasvot Växt’s strange, science-experiment origin story detailed in the Halloween “Phishbill”: “Subterranean Arctic Neurotechnology Orientation Station.”

Elsewhere on this Under the Scales episode, Marshall and company discuss how the Halloween set felt more like the adventurous song and lyric writing the band did in their earlier years (Brinkman’s guess at S.A.N.T.O.S. was “Stop And Notice The Outdated Simplicity”), how the “faceplant into rock” audio sample will probably return at least once during Phish’s upcoming New Year’s Eve shows at New York’s Madison Square Garden, why they were worried that Phish were going to cover a Residents album, Mike Gordon’s statement that “cherry plus spruce” is “what space smells like” and more.

Listen to the full Under the Scales episode here.