The speech in this audio clip matches what I thought was just noise in VIDEO TIMELINE | Hobgoblin Demon Jumps on Bed and in VIDEO TIMELINE | Miniature Hobgoblin Demon Hops Past Camera.
But, unlike animals under the sea, some demons live (or work) at different speeds. This may be because their ability (or preference) to alter the flow of time around them—some speak so slow that they sound like a rumble when recorded, while some speak so fast they sound like a squeak.
In this original recording of the Voices Demons conversing with humans somewhere in my apartment (the attic?), you can hear a rustling sound that sounds like my hand moving across the trackpad on my MacBook Air; but, when played at a slowed rate, lowered pitch, amplified and cleaned of some of the background noise, it reveals much more than a squeak:
The demon repeats the same remark made in the recording of a secret conversation, in which Danny Napolitan says, "Fucking fag!" It is also repeated in another recording on this blog and in Noise Harassment on Vimeo.