Analog audio · declared evidence
Headset splitter or headphone splitter?
Identify split versus combine direction, a missing microphone path, and CTIA/OMTP evidence without guessing by brand.
Your declared connection
Two meanings of “splitter”
A headphone-sharing adapter duplicates a playback output. A headset-to-PC adapter separates the headphone and microphone contacts into the corresponding device jacks. These are different functions even when both have a Y shape.
Direction and contact order are separate
One TRRS headset into separate PC jacks needs one female TRRS socket and two male plugs. Separate headset plugs into a combo jack need the reverse socket/plug arrangement. CTIA/OMTP conversion swaps microphone and ground; it does not also perform either split/combine function automatically.
This tool specifies an adapter class, not a retail product or console compatibility. Microphone bias, remote buttons, jack detection, input permissions and proprietary wiring still depend on the exact products.