Next-Dimension Surround Reverb

Exponential Audio announces Stratus and Symphony plug-ins      31/10/17

Buying Choices

Exponential Audio has announced two brand new next-dimension surround reverb plug-ins called Stratus and Symphony.

Exponential Audio founder Michael Carnes told us, "Over the last few years, Exponential Audio has taken the leading position in multichannel reverberation. In just a few short weeks, that lead is going to get a lot longer. Our new reverbs address two issues - the ability to be more creative than ever before and to increase clarity within ever more complex mixes. We thought long and hard about both and want to give post sound professionals the tools to achieve more challenging goals. We believe Stratus and Symphony tick both boxes."

Here's more details direct from Exponential Audio...

Features at a glance:

  • Channel counts up to 7.1 in the basic version.  Up to Atmos, 22.2 and other formats with the 3D option. 3D is described later on this page.
  • Expanded EQ, building on the popular NIMBUS and R4 architectures.  Symphony even allows the user to modulate EQ in real time, using a pair of built-in oscillators.
  • Dense and powerful early reflection control -- twice as dense as PhoenixVerbSurround and R2Surround. There's a unique reflection pattern from every input to every output. Users need not worry about compatible fold-down.
  • Every single reverb channel is decorrelated, meaning no color changes when a mix comes down to stereo or mono channel widths.
  • Dynamic control with tail-suppression (expanded from NIMBUS/R4).
  • Warp, to add even more timbral and dynamic control.
  • More stem options. Not only can a user have mono-in/surround out, but they can easily generate a surround reverb from LCR input. This is one of many examples of how this can be used.
  • Optional tempo control of pre-delay and reverb delay.
  • CPU Efficiency: There are no reverbs on the market that give so much power yet with so little demand on the CPU. Stratus and Symphony carry that efficiency forward, even shutting off unused channels if no audio is present. No other plugin manages to give you back so much of your CPU.
  • Easy to use.
  • Over 1500 presets.
  • Quick zoom feature allows you to double the size of the GUI.

3D Option
For those working in immersive audio, whether Atmos, Auro, DTS-X, Imax, NHK 22.2 (or something else), then both Stratus and Symphony offer a 3D option. This option gives the user licenses for the base versions and also the 3D version of the plug-ins.

Here are some of the extra features - all in a single instance of the plugin.

All features of the base version.

  • Atmos Bed (7.0.2 or 7.1.2 ) in Pro Tools 12 and Nuendo 7.1/8
  • Special extensions to extend the Atmos Bed to add 4 additional height channels (Pro Tools 12 only).
  • Special extensions to extend other surround formats (5.1, 7.1, etc) to add 4 or 6 additional height channels (Pro Tools 11 or 12).
  • Auro 3D (9.1, 11.1, 13.1) and NHK 22.2 in Nuendo
  • Session compatibility with base version.  Session created with the base version can upgrade and the old session will still work, allowing the user to add height channels to existing work


Note: Immersive audio is currently supported only in Pro Tools (AAX) and Nuendo 7.1/8 (VST3). Other workstation support is being investigated for possible future releases.

Pricing and Availability:
On sale late November 2017, price TBA.

More information:



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