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BUTE Loudness Suite Surround

Mastering by Signum Audio

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Bute Loudness Suite

Experience a new standard of loudness mastery with Signum Audio's comprehensive loudness toolkit. NEW Limiter now available within the plugin.

Note: This product is the Surround Sound version. The Stereo version of Bute Loudness Suite is also available.

Signum Audio's high-end loudness solutions are an essential for any discerning mixing or mastering engineer. With loudness standards being introduced on all credible broadcasting and streaming platforms, these tools are being used by producers in broadcasting, radio imaging, sound design, game audio and music to deliver loudness-compliant audio without compromising on quality.

Innovatively Integrated For A Smarter Workflow

By integrating a TP Limiter and Analyser into one plugin, we save you time. The Suite also comes with a standalone Normaliser which is great for making those final checks or if you are looking for a quick, automated solution. For those using Audio Suite in Pro Tools, the Normaliser is neatly integrated into the plugin.

With a sleek interface and neat features like automatic re-metering, reloadable session data, custom alert system, interactive history overview, and the inclusion of the very latest delivery specs as presets, you’ll have more time to spend on the more creative aspects of audio production.

Smooth, Ultra-transparent Limiting

The high-end limiter promises to deliver seriously smooth, ultra-transparent limiting. It is driven by a new audio limiting algorithm using a novel approach that guarantees no true peak overshoot and the high-quality linear phase upsampling. Boost your levels even further whilst maintaining natural harmonics. If you are looking for high fidelity audio quality, that is just what you will get from this toolkit.


Mixing & Mastering:

  • Produce consistent masters
  • Avoid 'level shifting' and clipping downstream
  • Ensure accurate representation of your audio/music
  • Measure and refine dynamic content

Post-Production & Broadcasting:

  • Hit target levels easily with a wide range of implemented presets
  • Ensure and prove compliance with regulation
  • Balance dialogue, music and effects
  • Manage live broadcasting & streaming levels accurately and efficiently
  • Optimise dynamics for streaming content

Gaming Audio:

  • Balance sound effects and dialogue
  • ASWG 5.1 and 7.1 Surround Sound support (Surround version)


  • An advanced version of our Analyser, Limiter and Normaliser.
  • The Normaliser comes as a standalone application
  • The Analyser includes an integrated True Peak Brickwall Limiter & Audio Suite Normaliser
  • Unparalleled ease of use with clean and comprehensive user-interface
  • DAW Sync and automatic re-metering reflecting any adjustments for a smarter workflow
  • Wide array of built-in presets for the very latest loudness standards and recommendations
  • History overview and alerts letting you easily identify and quickly navigate around your session to areas that require your attention
  • Custom alert system so you can specify your own parameters
  • Incredibly insightful history graph
  • Toggle between readings for short-term & momentary loudness, true peak, and traditional RMS to declutter your session
  • Flexible and collapsible so you can have a graph or numerical view
  • Can handle long session - 10+ hours of data
  • Reloadable session data
  • Save, Load and Export metering data
  • The Surround version expands support for multi-channel configurations up to 10-channel Atmos.
  • Available for Windows and Mac
  • Compatible with VST / VST3 / AU / AAX (including Audio Suite)
  • Pro Tools 12.5 or higher

The Analyser with Integrated TP Limiter

The Analyser is the backbone of the Suite providing you with all the insights you need. Switching on our ultra-transparent, high precision True Peak Brickwall Limiter in the Analyser will take care of True Peak overshoots for you.

We are very proud of the DSP behind the limiter which rather than having the usual attack and release, uses a wave shaping algorithm to smoothen the waveform. The novel limiter design has been developed from scratch for maximum transparency and brickwall limiting. Peak to True Peak conversion is being done with highest quality distortion free linear phase resampling.

Versatile Limiter Plugin

You also get a more versatile Limiter plugin with the bundle, which includes 5 Different release modes to choose from including Linear, Transparent and Pumping, with optional automatic release time calculation depending on content. Easily adjust Gain and Release to tweak your audio just how you want it, seeing clear and precise readings displayed throughout.

The Normaliser with Integrated TP Limiter

The Normaliser allows you to make final checks or provides a quick solution for loudness-compliance if you're in a hurry. Just choose your preset and hit render! The Audio Suite Normaliser is integrated into the Analyser plugin.

Loudness normalisation is never a substitute for meeting compliance at the mixing stage, but it is a great way to give you peace of mind and to double check your mixes when delivering to a new spec.

DAW Synchronisation with Automatic Re-Metering

Whether you use Pro Tools, Ableton, Logic, Cubase, Premiere Pro (or most other DAWs for that matter), Bute will synchronise with it and lock to the transport. When you make any adjustments in your DAW, it will be automatically reflected on the overall metering and history graph.

Extensive List of Built-in Presets

Bute is fully compliant with all revisions of ITU-R BS. 1770, EBU R128, ATSC A/85, OP-59, ARIB TR-B32, Spotify, YouTube, Apple Check, Hulu, Netflix, TIDAL, Sony Gaming (ASWG), AES Streaming Recommendation, US Public Radio (PRSS), TIDAL and Pandora. You can also save multiple user-defined presets.

History Overview with Alert System

The detailed history overview gives you complete oversight and insight of your session. Areas of your audio that need your attention will be shown in red in the history overview. Easily navigate to the areas that require your attention and zoom in and out. Handling a long session? No problem!

Custom Alert System for your Own Parameters

You can specify your desired range parameters in the "Custom Alert System" section of the settings menu. Sections of your audio that go out with the specified range will appear in yellow on the history overview.

Easily Toggle between Readings

Toggle between short-term and momentary loudness, true-peak, and traditional RMS readings at the click of a button. This means you can only customise the graph to only present the information you need. The same goes for switching between absolute and relative scale.

Flexible and Scalable

Resize the window how you want, with a collapse button so you can switch between graph and numerical view.

Save, Reload and Export Metering Data

If you need to save multiple sessions for different platforms, you can. Bute will also reload metering data from previous sessions so you can head home and continue the next day where you left off. If you need to prove your programme or audio file is loudness compliancy, you can export CSV logs too.

System Requirements

  • Operating System: Mac OSx 10.9 Lion or higher / Windows 7 or higher
  • Formats: VST/ VST3/ AU/ AAX (including AudioSuite)
  • Architecture: 64Bit Only
  • Surround Sound format (includes up to 7.1.2 support).

Any references to any brands on this site/page, including reference to brands and instruments, are provided for description purposes only. For example references to instrument brands are provided to describe the sound of the instrument and/or the instrument used in the sample. Plugin Boutique do not have (nor do they claim) any association with or endorsement by these brands. Any goodwill attached to those brands rest with the brand owner. Plugin Boutique or its Suppliers do not accept any liability in relation to the content of the product or the accuracy of the description. "RHODES" is a registered trademark of Joseph A Brandstetter.

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