In a posting on Musical Gnosis, Oz Fritz mentions both Brian Eno and John Coltrane and makes this assertion:
I began to entertain the notion that the mood of a space can recorded onto a reproducible medium from cleaning up and mastering hundreds of talk tapes in E. J. Gold's archive recordings which date from the '60's. Sometimes the intense mood given off had a much stronger effect than the words being said. I've heard Robert Anton Wilson talk tapes that also have this quality. The atmosphere around these talks communicates something as well.