Originally Posted by Botley

Actually, parts of "Cluster One" opened the 1994 shows every night as part of their intro tape.

The sounds of the earth's crust cracking (which are heard at the very start of "Cluster One"), along with many other effects, were incorporated into the ambient soundscape that played for over 45 minutes as the audience was filing into their seats. Part of this was included on the Pulse audio cassette... but it's pretty boring and sometimes downright irritating to listen to, on its own.