Who and what are Arc Met? They are a three (now four) piece space rock band from the west of Massachusetts. Sometimes described as the best Krautrock band in the US, their sound and name are linked. The name,thought of by founding member and keyboardist Paul Eggleston, comes out of the way the band composes songs through jam sessions. "Our music is constantly improvisational. It turns into something eventually, like architecture. It's sort of a psychedelic process".