Nugen Audio Halo Vision Review

Nugen Audio Halo Vision: what is it?

Halo Vision (AU, VST3, AAX) is a real-time analysis suite for surround and immersive audio capable DAWs and supports up to 7.1.2. Its modular design and customizable interface lets you open and resize only the analyzers you need, and most modules include ranges, colors, and more. user definable.

On a global level, you access a bunch of presets via the top bar. There is also a selection of DAW-specific multi-channel routing presets that can override the automatic option if needed. Halo Vision follows Dolby Atmos’ recommended naming for surround channels, but be aware that some DAWs use their own labeling (Logic Pro for example).

Nugen Audio HaloVision

(Image credit: Nugen Audio)

Nugen Audio Halo Vision: performance and verdict

Halo Vision has seven modules. These include multi-channel peak meters, group-based spectrum analysis (up to five channel groups) and information displays (timecode), and your DAW may already provide some or all of them. these options.

However, the real fun begins with Correlation Matrix, Correlation Web, Frequency Haze, and Location Haze. As their name suggests, correlation counters provide correlation information for specific channel pairs. With multi-channel audio, there are quite a few combinations to show off.

Also think…

Waves Durrough Surround

(Image credit: Waves)

Dorrough Waves Surround (opens in a new tab)
Multi-channel meters that allow you to display sum/difference and phase for user-selectable channel pairs.

Voxengo SPAN Plus (opens in a new tab)
A flexible channel analyzer that can be configured to display frequency curves for multi-channel audio.

The Matrix solution is an XY grid configuration with each pair of channels represented by a cell. The color of this cell then indicates the phase relationship. The color changes from green (fully in phase) to red (completely out of phase), so you can, at a glance, see where potential problems are.

Hover your cursor over a cell and that relationship will also appear on the arc-shaped correlation meter to the right. The matrix also features an anti-correlation alert with a user-selectable threshold, whereby the cell lights up red, providing a more eye-catching indicator.

The Matrix is ​​excellent but takes a bit of time to interpret. This is where the correlation web comes in. Arranged as a plan view of all the channels, there are connection lines between each of them. If the correlation becomes negative, the corresponding line lights up. The more the channels are out of phase, the more intense the color. Clicking on a channel label solos the various relationships of the individual channel.

out of the mist

The two Haze counters cover frequency and location. The Frequency Haze displays frequency content across the surround panorama, with the lowest frequencies in the center and the highest at the edge. The main plan view also includes typical speaker locations around the edge. Location haze shows energy distribution across the surround panorama with brighter colors indicating higher intensity.

In both cases, if your surround has aerial channels (7.1.2 for example), these are displayed by an additional meter at the bottom. Interpreting haze indicators takes time to master, and we found this especially true for Frequency Haze. That said, just like the correlation meters, if the indicators are extreme or the panning distributions unusual, this is immediately apparent, and this will of course draw you in for closer inspection.

Nugen Audio HaloVision

(Image credit: Nugen Audio)

Why do you need this plugin?

If you already work in surround sound or immersive audio, Halo Vision will be an invaluable addition to your toolkit and should help you reaffirm the impact of your existing practices. However, we know that the vast majority of our readers will not fall into this category.

Nevertheless, Dolby Atmos is clearly gaining traction, especially in its binaural format, which Dolby has focused on. Consider its incorporation into mainstream DAWs, as well as the need for people to work on surround formats without approved monitoring or even surround monitoring for that matter, and it’s completely understandable that measurement and analysis become considerably more important.

So if you’re one of the many people who are now preparing Dolby Atmos mixes purely on headphones and you rely on binaural presentation to make decisions, getting a different perspective isn’t a bad thing, and that’s what that Halo Vision can help bring.


Halo Vision offers a great way to visualize various aspects of your surround sound and tackles these complexities very well. If you are used to using a selection of different counters, its unique configurable window will also be welcome.

MusicRadar’s verdict: Halo Vision provides an excellent counter toolkit; perfect for anyone working in multi-channel audio and is useful if you’re working with compromised monitoring.

Nugen Audio Halo Vision: Hands-On Demos


Michael G. Wagner


Nugen Audio Halo Vision: Specifications

  • Formats available: Supports 64-bit AAX, VST3 and AU. Halo Vision requires a surround-compatible plug-in host such as Pro Tools HD.
  • Minimum System Requirements: Mac OSX 10.9.x / 512 MB of RAM. Windows (64-bit) Vista or higher / 512 MB of RAM.
  • CONTACT: NugenAudio (opens in a new tab)

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