科幻开关拨动

Compact sci-fi switch flip, 140 ms. A single distinct metallic toggle: a solid 200 Hz click with a clear 1.5 kHz edge; the on version ends a semitone higher, the off version a semitone lower. Clearly audible at a normal level, dry, mechanical, unambiguous, with body across the full 140 ms. No reverb, no beep.