4 ms·

This was basically an audio coordinate system (or just a 2D array): an X tone and a Y tone played at the same time. Auditory....Vectors? (Thinking aloud)

• femto 6y ago
  The Quadrature Amplitude Modulation used by the modem (the last part of the sequence, which sounds like white noise) really is a sequence of auditory vectors.
  • gugagore 6y ago
    Humans can't hear a phase difference.