Know exactly how loud your mix is — and whether it's ready for release.
Gaugex is a loudness meter for your master bus. It measures LUFS, true peak, dynamic range, and stereo image against ITU-R BS.1770-4 / EBU R128, then tells you at a glance whether your track hits the target for Spotify, Apple Music, YouTube, and more. It listens transparently by default — the signal passes straight through untouched.
Fully signed and notarized for macOS as AU, VST3, and Standalone.
- Go to the latest release.
- Download
Gaugex_Installer.pkg. - Double-click it and follow the installer. Because it's signed & notarized by Apple, it installs cleanly — no security warnings, no right-click, no "Open Anyway."
- Restart your DAW and rescan plug-ins.
Full guide: remiblaze.com/support.
- LUFS Loudness — Integrated (gated), Short-Term (3 s), and Momentary (400 ms), per ITU-R BS.1770-4 with exact K-weighting and absolute/relative gating.
- True Peak — 4× oversampled inter-sample peak detection in dBTP, plus sample peak in dBFS.
- Loudness Range (LRA) — EBU R128 / TECH 3342 dynamic-range measurement (10th–95th percentile of gated short-term loudness).
- PLR / Crest Factor — Peak-to-Loudness Ratio to gauge how much dynamic headroom remains.
- RMS Level — Average level readout in dB.
- Platform Targets — Spotify (−14), Apple Music (−16), YouTube (−14), Club/DJ (−6), Broadcast (−23 LUFS), or a custom target — with a pass/fail check and a Gain-to-Target readout showing exactly how many dB to move.
- Loudness History — Scrolling graph of loudness over time.
- Stereo & Phase — Phase-correlation meter, mono-compatibility delta (stereo vs. mono LUFS), and low-end phase correlation.
- Spectrum Analyzer — Real-time FFT display of your mix's frequency balance.
- Low-End Energy — Ratio of low-frequency energy to total, for checking bass balance.
- Gain Trim — Adjust level in place from −24 to +24 dB.
- ISP Ceiling — Opt-in −1 dBTP true-peak ceiling for safe delivery.
15 built-in target/mastering presets (Streaming Ready, Apple Music Master, YouTube Master, Broadcast, Club Dominance, and more) to jump straight to the right platform target.
- macOS 15.0 or later
- Apple Silicon or Intel Mac (Universal Binary)
- Any AU or VST3 host (your DAW of choice)
Open an issue on the Issues tab with your macOS version, DAW + version, and steps to reproduce.
- Developer: Remi Blaze.
- Framework: JUCE.
- License: free under a proprietary Freeware License (see also our terms). Reverse-engineering, repackaging, binary redistribution, or reselling the compiled installer is strictly prohibited.
Spotify, Apple Music, and YouTube are trademarks of their respective owners; Gaugex is not affiliated with or endorsed by them. Platform names denote loudness targets only.
All product names, company names, and logos mentioned herein are trademarks or registered trademarks of their respective owners. Any such references are used for descriptive or compatibility purposes only and do not imply affiliation with, endorsement by, or sponsorship from their owners.
VST is a trademark of Steinberg Media Technologies GmbH, registered in Europe and other countries.
Apple, macOS, Audio Units (AU), and Apple Silicon are trademarks of Apple Inc., registered in the U.S. and other countries.