>>974
the thing that makes it cut out the rest of the audio when it kicks in, is sidechain compression. you use the audio of one channel (the 'monster noise') to trigger a compressor on the 2nd channel (the rest of the audio). This means you can compress the audio down without anything going past the headroom, and it means that you can have a 3rd channel that doesn't get compressed at all. That's what that seems to have been.
additionally that reminds me of this album/playlist
https://www.youtube.com/watch?v=yAAM9qkIjuU&list=PLNrQMpeh_fpLNRrWdvnDP3-v0tCsUuaAs
(Renard - Silence)
it also reminds me of pieces of this
https://www.youtube.com/watch?v=bmWgZ40dZDk
(Soundtrack - Sunshine, the non orchestral parts of it anyway)
and the obvious
https://www.youtube.com/watch?v=V9Ty3YnWN80
(Gosdspeed you black emperor - East Hastings - which is permanantly unsettling to me because of 28 days later)
One thing I suggest you do is find other music that is "creepy" or "scary" that isn't "cheesy" and study it. what key is it in, is it actually in tune (not usually) what kinds of ambient sounds are there (rushing sounds, flowing air, fans, industrial equipment, buzzing of lights, metal on metal, distant thumps reverberating on things) what kinds of effects are there (reverb, echo, 'preverb' distortion, time stretching, granularization), is there a melody (rarely, often repetitive and constantly building)
And to emphasize the Constant repetitive melody and the constant building….
https://www.youtube.com/watch?v=1hbQpjYtbps
(tubular bells)
https://www.youtube.com/watch?v=ST2H8FWDvEA
(In the house in a heartbeat)
https://www.youtube.com/watch?v=i6OtF7daIPM
(28 days/weeks later theme that isn't in the house in a heartbeat)
basically,
Establish tension
dissonant sounds
maintain tension non stop
constant building
no resolution. climax, then silence or soft fade out.
or if you just want to be creepy, you can stop at establish tension, dissonant sounds. and just keep that going as long as you can, subtly. since that would be ambient noise, you don't need to even consider tempo. you can, but you don't have to.
basically between the use of effects to create dissonant unsettling sound textures, use of sharp noises, slightly detuned instruments in the right key, and constant building/rising, and you're garaunteed to write horror.
I only know all of this because I did this on accident back when I considered myself a furry and started dumping music on FA, back before soundcloud existed.