A heartbeat & body sound effect, generated with Stable Audio 3.0 SFX from the prompt below. Copy the prompt, change a word and generate your own version.
human heartbeat at rest, slow double thump about once per second, deep chest resonance, very close and internal, 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.