Pulse of threat

Dark cyberpunk ambience with industrial edge, 135 BPM. Slow evolving sub‑bass drones with phased distortion and deep frequency modulation pulses that feel like mechanical breathing. Sparse but heavy metallic hits and resonant clangs with long decay tails. Minimal percussive pattern with irregular timing and off‑grid ghost hits. Cold synth pads with long reverb tails and subtle detuning for dissonance. Subtle circuit noise, hiss, and occasional glitch pops to enhance the analog/broken feel. Add low‑frequency rumbles and random low‑amplitude dropouts to create unease. No vocals. Mood: oppressive, claustrophobic, threatening.