Signum Audio BUTE Loudness Suite 2 review
A focused loudness toolkit for broadcast, streaming, mastering and post-production workflows.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Signum Audio BUTE Loudness Suite 2 is an audio mastering and loudness-management toolkit for mixing, mastering, post-production, broadcasting and gaming audio. It combines loudness analysis, true-peak limiting, normalisation and a standalone normaliser application, making it a fit for engineers and production teams that need repeatable loudness checks across stereo or surround work. It runs on Windows and macOS and supports VST, VST3, AU, AAX and AudioSuite plug-in formats.
Its strongest area is loudness compliance. The suite provides integrated, short-term, momentary, True Peak and RMS readings, plus presets covering standards and services including EBU R128, ATSC A/85, Spotify, YouTube, Apple Check, Hulu, Netflix and TIDAL. DAW synchronisation and automatic re-metering support an in-session workflow, while custom warnings, alerts, history graphs and CSV export add useful review and reporting options. Pro Tools users also get AudioSuite normalisation, and the suite supports stereo, 5.1, 7.1 and up to 10-channel Atmos configurations through the relevant plan.
The published plans show a £199 one-time price for Stereo and £249 for Surround, with 14-day trial versions for both configurations. Stereo includes the loudness analyser, True Peak Brickwall Limiter, AudioSuite normaliser and stereo channel support; Surround adds metering, normalising and limiting plug-ins for broader channel configurations. That pricing suits buyers who need a dedicated compliance toolkit, but makes the product less appealing for occasional users with simpler metering needs. Choose it for broadcast, streaming, mastering or post-production workflows that benefit from extensive standards and channel support; choose an alternative if a perpetual free plan or a lower-cost stereo tool is the priority.
Signum Audio BUTE Loudness Suite 2 pros and cons
- Where it wins
- Supports broadcast and streaming loudness standards
- Includes true-peak limiting and Pro Tools AudioSuite normalisation
- Offers stereo, surround, alerts, history graphs and CSV export
- Where it doesn't
- Stereo licensing costs £199 as a one-time purchase
- Surround support costs £249 as a one-time purchase
- No perpetual free plan is offered
Signum Audio BUTE Loudness Suite 2 fact sheet, pricing and score →
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