For a real-world example, listen to 2 TVs several meters apart and tuned to the same channel. At least with OTA or cable you can expect them to be playing ~simultaneously but the skew between the received signals is easily perceptible.
They do depend upon vision or touch if it is an interactive app.
>For a real-world example, listen to 2 TVs several meters apart and tuned to the same channel. At least with OTA or cable you can expect them to be playing ~simultaneously but the skew between the received signals is easily perceptible.
I believe what you're experiencing is the difference in decoding latency between different models of TV set. Several meters (3m) represents only about ~9ns (practically, low tens of ns if the cables are longer than necessary) maximum delay. It would not be directly perceptible by a person. Signal delay in a cable is ~1ns/ft.
Discrepancies between tracks are totally unrelated to the visuals. It's much easier to tell if two sounds are synced than a sound and a visual.
> Signal delay in a cable
I don't know what comment you read but it's not the one you replied to. Same model, synchronized visuals, easy to hear audio desync when you're closer to one.