I used the "the challenge. Wav" base (id: 561988) and made a simple melody with a synth, added effects and some beats. I used some fl studio effects: reverb, echo, distortion, equalization, amplify, low-fi effect, low-pass, drums and synthesizer. Amazing challenge as always, thanks badoink.
Low rumble using interface noise neural dsp gojira, acustica coffepun and heavy filtering. I also added a high-passed filtered mid-side version for the stereo image.
A low, rumbling bass sound with a short little "gurgle" at the end. A creepy sound for scary conditions. Made by low-passing a unisoned saw + subtle fx.