3 ms·

Sure, but he’s using computer/phone speakers and mics and audio interfaces. These can’t generally produce or sample frequencies above 24kHz.

• mordae 1y ago
  20kHz, actually. They tend to have really sharp filters with -3dB @ ~0.4 fS.
  • sneak 1y ago
    All frequencies above 24kHz are also above 20kHz. :)