I/O box

An I/O box (input/output box) is a dedicated hardware device — a Blackmagic UltraStudio, DeckLink card or Mini Monitor — that sends a clean, colour-managed video signal straight from Resolve to a reference monitor, bypassing the computer’s operating system and graphics card. That matters because a signal piped out of a normal HDMI or DisplayPort port passes through Windows or macOS colour handling and the GPU, either of which can quietly alter it. An I/O box gives you a trustworthy pipe: what Resolve renders is what reaches the screen. It only affects the feed to a dedicated reference or client monitor — if you are just viewing on your computer display, it does nothing for you.

First used in: 2.12 · The honest suite