Overview

The Display tab controls everything about the HDMI output.

Image adjustment

ControlRange
Overscan0–10%, to pull the image in from the edges of a TV that crops
Flip180° rotate, mirror horizontally, or mirror vertically

Flip happens at scanout, so it costs nothing in latency or CPU.

Hotplug

Unplugging and replugging the display is detected live. The output re-reads the display’s capabilities and re-applies your settings — no reboot needed.


Output Mode

There are three ways to drive the HDMI output.

ModeBehaviour
Auto (default)Use the display’s own preferred mode, read from its EDID
Follow sourceRe-tune the output live to match the incoming NDI® source’s resolution and frame rate
ManualPin it to a specific mode from the list the display advertises

The list of available modes comes from the connected display, so you can only ever pick something it can actually show.

You can’t get stranded

When you apply a mode by hand, the device shows it and then waits for you to confirm the picture. If you don’t — because the screen went black, or the display couldn’t sync — it puts the previous mode back on its own.

So a wrong guess never leaves you with a dead screen and no way back in.

4K

The output will drive up to 4K at 60fps where the display supports it.

Whether the source can keep up at 4K depends on how it was encoded: full-bandwidth NDI® (SpeedHQ) is decoded in software and manages 4K at 30fps, while NDI®|HX (HEVC) lands on the hardware decoder and manages 4K at 60fps. See Single Source.


Signal Loss

When a source disconnects, you decide what the room sees.

SettingWhat appears
Placeholder (default)A holding card with the device name, its address, and a status line
BlackA clean black screen — the usual choice front-of-house
Last frameFreeze on the last frame received

Your own holding image

Upload a full-screen image and it replaces the default holding card — so between sessions the room sees your branding, or wayfinding, rather than a device name.

PNG, JPEG, GIF or BMP, up to 20 MB.

If Last frame is selected but no frame has ever arrived, the screen falls back to black.


Visualisers

MMG D:ONE can render the audio it receives instead of — or between — video.

ModeWhat it does
Normal (default)Show the video
SpectrumA real-time spectrum analyser driven by the incoming audio
AmbienceA flowing, plasma-like visual whose motion follows the beat of whatever is playing

Ambience detects the tempo of the audio and moves with it, so it stays in step with a set rather than drifting.

This turns the unit into a second product in its own right: a beat-reactive visual source for a bar, a club, or a stand — with no VJ software and no separate machine.