Supplemental Audio 1. Low-frequency binaural beat (listen over headphones). Two tones of slightly different frequency are played to the two ears, causing a running phase difference that is perceived as a “spatial roughness.” This requires that phase information is preserved in the neural coding of the sounds, which is the case for low frequencies of this demo: 500 and 508 Hz. [Note: computer sound reproduction is typically affected by many soft- and hardware components. It is essential for this demo to have clean separation between the electrical signals going to each earphone. This is easily checked by lifting one earphone and letting it rest e.g. on the temple of the head, while listening to the other earphone: the binaural effect, here the “roughness”, should then disappear. If it doesn’t, this is an indication of (electrical) interaction somewhere in the computer’s reproduction of the signals to the two earphones.]

Supplemental audio from the 2019 review by Philip X. Joris and Marcel van der Heijden, "Early Binaural Hearing: The Comparison of Temporal Differences at the Two Ears," from the Annual Review of Neuroscience: https://www.annualreviews.org/doi/10.1146/annurev-neuro-080317-061925?utm_source=soundcloud&utm_medium=ne.joris&utm_campaign=suppvideo

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