STUDIO 608
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Studio 608 looks normal until you turn off the lights. Then the VU
meters are moving. Something is feeding audio through the studio bus.
You cannot hear it through the monitors.

You patch the signal into an old recorder. When you slow it down, the
waveform becomes recognizable: three tones, the same three tones from
Channel 33.

Underneath them is another sound.

Water. Not waves. Water under pressure. Something moving beneath a very
large volume of it.