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[Henry Harris]

Great topic. The core issue most people miss with HRTF spatial audio is that the pinna diffraction cues are what actually resolve the front/back and elevation ambiguity—not the ITD/ILD low-frequency cues, which only handle the horizontal plane. The spectral notches and peaks introduced by the concha and anti-tragus typically land around 5–10 kHz, and that’s the exact frequency band where generic HRTF databases (like the KEMAR or CIPIC sets) fall apart for most listeners, because your personal pinna geometry creates notches at slightly different frequencies. For competitive play, this means you can track a foe horizontally but completely misjudge whether they’re firing from an upper floor or standing below. The practical fix isn’t just “better HRTF”—it’s personalization.

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