Signum Audio Bute Loudness Suite 2 Surround

Surround Metering, Limiter, and Normalizer Plugins

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    Digital Products

    Digital Products are delivered electronically either via your order status page, or via email.

    No physical product will be shipped to you!

    In most cases, the product you purchase from us is a serial number/license code/activation code to register the product with the manufacturer and download directly from them. This ensures you receive the latest version of products, and the best support when necessary.

    After purchase, your license code and relevant links will appear on your order status page, or they will be sent to you by email.

    For detailed instructions on the registration/download process, you can visit our dedicated page by clicking here: Install Instructions.

Education Proof

Products with education pricing are for students & teachers only. To prove your education status we require that you upload proof in the form of an image/PDF.

Types of proof


Student ID Card, Letter of enrollment, or similar


Teacher ID Card, Lecturer ID Card, Payslip, Letter from the school/college

Education proof is submitted to the manufacturer and is accepted at their discretion.

The Basics

iLok is a copy protection method used by many of our brands.

It has 3 types of activations, iLok USB, iLok Machine, and iLok Cloud.

Different brands/products will offer different iLok methods. iLok USB is always an option, but the availability of iLok Cloud and iLok Machine methods is at the discretion of the software developer.

iLok Account

For all iLok protected products, you will need an iLok account. You can create one for free here:!registration

iLok License Manager

To manage your iLok licenses, there is a dedicated app called iLok License Manager. This app is used to register, activate, and move your licenses between locations.

You can download the latest installers from the iLok website:!home

iLok USB Key

iLok USB

This activation is stored on an iLok 2 or 3 USB key.

It is the best option for portability, if you frequently move between multiple machines, and offline use.

iLok Machine ID

Machine ID

This activation is stored locally on your computer.

While this is a convenient way to work offline, and does not require the additional cost of an iLok USB, there is the risk of a license being lost in the case of a drive failure.

This option also requires extra care when you upgrade to a new computer, the license(s) must be deactivated on your old machine first to ensure you do not lose them.

iLok Cloud

iLok Cloud

This activation is based online, and requires a "cloud session" using the iLok License Manager.

It requires an active internet connection for the entire time you use the plugin(s).

This bundle includes:

  • Bute Normaliser Surround
  • Bute Limiter 2 Surround

Master Smarter with our all-in-one loudness toolkit designed to help you mix and master to loudness standards with ease and avoid unwanted distortion downstream.

Propietary algorithms provide ultra-transparent True Peak brickwall limiting, automated normalisation and accurate metering for a professional, natural sound.

All in one package with smart worfklow features including history overviews and built-in presets for all major streaming and broadcasting platforms up to Dolby Atmos 7.1.2 configurations.

What Does Bute Loudness Suite 2 Do?

Many producers are moving towards mixing and mastering within loudness specifications set by major streaming and broadcasting platforms for quality assurance.

Loudness indicates the perceived level of a signal that is indicative of human hearing, making BUTE Loudness Suite 2 is a useful reference tool when mixing or mastering with an integrated True Peak Brickwall Limiter for guaranteeing no overshoots.

The proprietary algorithm provides accurate loudness metering data on a beautiful and completely interactive graphical user interface which clearly highlights areas requiring your attention, while our limiting algorithm provides the utmost transparency for a natural sound that stays faithful to your mix.

Smart, Synchronized Workflow

Loudness metering tools are ideal for balancing music, dialogue and sound effects whether in stereo or up to Dolby Atmos 7.1.2 surround sound.

Long-form content is made much easier to deal with using our smart history overview.

Get an overview of up to 10 hours of content and navigate to any section of a track with ease using the interactive display.

BUTE's custom alert system will clearly point out areas that go out with a user-specified range and any True Peak overshoots.

A wide array of industry-standard presets are included.

Mixing and Mastering with Bute

All of our BUTE plugins are compatible with VST, AU, and AAX (including Audio Suite), so they will synchronize harmoniously with almost any DAW.

The smart auto re-metering feature gives instantaneous feedback on how loudness will be affected by changes to the mix so there is no need to re-meter the whole mix.

Readings for Absolute/Relative Scale, True Peak/LUFS, and Max/Live modes are easy to toggle between from the main display.

Powerful Compact Read-Out View

When screen estate and CPU are at a premium, a compact read-out helps keep things optimized, and BUTE is completely resizable.

Even while in compact view, easily switch between display settings and tweak limiting configurations, while saving screen estate for other programs.

Stay Faithful to Your Mix

Smooth out peaks by adjusting pre-gain and selecting a preset release curve - Transparent, Natural, or Smooth - which have been designed to make gain reduction as unnoticeable as possible.

The release time configures automatically based on multiple properties of the input signal, and the dial is used to set the multiplication factor of the calculated release time, enabling fine-tuning.

BUTE can also be utilized as a maximizer to push quieter mixes louder without sacrificing dynamics and clarity, while taking care of True Peak overshoots.

The result? Audio stays faithful to the original sound, whilst fitting the loudness spec of any platform.

Bring Your Music to All Broadcasting and Streaming Platforms

All the tools in your hand to make your music sound optimal on Spotify, YouTube, TIDAL, Apple Check, and more.

Signum regularly updates presets and includes most platforms.

User-defined presets for internal standards can also be created and saved.

System Requirements

  • MacOS 10.9 Mavericks and above
  • Windows 7 and above (64-bit only)
  • Intel, AMD, or Apple Silicon CPU

Plugin Formats

AAX Native, AU, VST2, and VST3

User Manual

Crossgrade Proof

This crossgrade is for owners of a competing DAW. To prove your DAW ownership, we require that you upload proof in the form of an image/PDF.

Types of proof

A copy of your purchase receipt for the original license or the most recent update/upgrade

A screenshot of your product registration

A photo of your package (either CD/DVD or printed manual), with the unique serial number included in the photo.