A drones & soundscapes sound effect, generated with Stable Audio 3.0 SFX from the prompt below. Copy the prompt, change a word and generate your own version.
dark sustained drone, low detuned tones slowly beating against each other, oppressive and airless, seamless loop
Generated with Stable Audio 3.0 SFX. These models respond to material, action and space, so the most useful edit is usually swapping one concrete noun for another.