How can I make an ominous song similar to this one?

Questions about producing? Ask them here.
I want to make songs for the Undertale AU I'm creating. I'm working on that AU's version of the song that plays when you meet Chara in the Genocide Route. Link (JUMPSCARE WARNING): https://www.youtube.com/watch?v=1ASFATNnmys

The "heartbeat" sounds would be easy enough, but how would you recreate the sireny noises?
Retronaut wrote:
Thu Mar 15, 2018 12:27 am
how would you recreate the sireny noises?
-Actually, i do not think they are sirens. I believe they are ..frogs!
These sounds are quite similar to those you would hear in the amazonas, or other rain-forests
https://www.youtube.com/watch?v=81wutL8j7cI @0:00
Imagine these sounds looped and perhaps layered 3 - 4 times..
But sure you can build the sound.
Read about LFOs here:
https://lmms.io/wiki/index.php?title=In ... or#The_LFO
With a LFO you will be able to make an oscillating sound, then its mostly about pitch and variation.

Besides that, since you are new here- Welcome to the forum Retronaut !
You will get a PM today, with all you need to know about our forum :) Please read!
musikbear wrote:
Thu Mar 15, 2018 5:02 pm
Retronaut wrote:
Thu Mar 15, 2018 12:27 am
how would you recreate the sireny noises?
-Actually, i do not think they are sirens. I believe they are ..frogs!
These sounds are quite similar to those you would hear in the amazonas, or other rain-forests
https://www.youtube.com/watch?v=81wutL8j7cI @0:00
Imagine these sounds looped and perhaps layered 3 - 4 times..
But sure you can build the sound.
Read about LFOs here:
https://lmms.io/wiki/index.php?title=In ... or#The_LFO
With a LFO you will be able to make an oscillating sound, then its mostly about pitch and variation.

Besides that, since you are new here- Welcome to the forum Retronaut !
You will get a PM today, with all you need to know about our forum :) Please read!
Thanks. But how would I recreate the jumpscare noise in the song?
Retronaut wrote:
Thu Mar 15, 2018 8:38 pm
Thanks. But how would I recreate the jumpscare noise in the song?
That is called 'kakafony' and is notes out of scale, that crashes against each other. Hard dis-harmonies perhaps layered several times.
Try to use the plugin Plate. That can make it 'thundering' and add vibration with LFO.
Try to construct one, upload on sound-cloud, and link us to your result, then we perhaps can give more pointers.

Btw - did you read your PM? - please follow the instruction for quotes..
I just read it and thanks for answering. I'll try to make my song by the end of March.