Cold emptiness

Minimal dark cyberpunk ambient, 135 BPM. Deep sub‑bass drones with slow phasing and subtle frequency warping. Very sparse metallic percussions with wide spacing and extreme reverb. Cold synth pads tuned in dissonant intervals, with long decays and modulation. Light circuit noise and hiss. Add thin, high‑pitched sine tones that appear and disappear unpredictably. No vocals. Mood: empty corridor, cold metal, isolation, impending danger.