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| live =N/A}}This is the sixth track on the ''Quake '' Soundtrack. Its percussion loop is manipulated into sounding similar to a pulsating heartbeat, joined by deep synthesizer layers then eventually left alone. Level names: "The House of Chthon" (E1M7), "The Underearth" (E2M7), "Azure Agony" (E4M7).

 {{Succession box| title=[[Category:NIN SongsQuake Soundtrack]] | before=[[Quake soundtrack - Track 5]]| after=[[Quake soundtrack - Track 7]]| track=6}}[[Category:Rare Related to NIN Songs]][[Category:NIN InstrumentalsSongs credited to Trent Reznor on a soundtrack]]