Freedom251 › Audio Analysis Software
Klangfreund LUFS Meter
What Klangfreund LUFS Meter is
Klangfreund LUFS Meter is an audio plug-in for measuring and adjusting perceived loudness in real time. It synchronizes meters across tracks for an initial mix, can equalize loudness against reference tracks, and lets users choose a target loudness. The full edition measures integrated, momentary, and short-term loudness, loudness range, and true peak, with listed standards including EBU R 128, ATSC A/85, ITU-R BS.1770-4, and OP-59. Views include a loudness history graph, bars, numeric values, and true peak. Analysis supports up to two channels and does not include offline file analysis. macOS and Windows support multiple plug-in formats; Linux is experimental and supports VST. The demo runs on all three systems but limits measurement periods to under one minute, and no personal data is required to obtain it. Pricing starts at $19 with a 30-day trial and no free plan. Licenses can run on three computers simultaneously, and the core algorithm is MIT-licensed.
Who it suits
It suits musicians, producers, audio professionals, and videographers working with real-time loudness. Users needing offline file analysis or more than two channels should note its listed limits.
What it does well
- Real-time loudness analysis
- Supports major listed loudness standards
- Synchronizes meters across tracks
- Three-platform demo with no personal data required
- License runs on three computers simultaneously
What to know first
- No offline file analysis
- Maximum of two channels
- Linux support is experimental
- Demo measurements are limited to under one minute
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Discounted LUFS Meter | Page shows “Buy for $24 $19”; billing interval not stated. · For non-commercial projects · Up to 6 synchronized meters · 1 synchronization group · No commercial use | $19, paid once |
| LUFS Meter | Page shows “Buy for $49 $39”; billing interval not stated. · Commercial use allowed · Unlimited meter synchronization · 32 synchronization groups | $39, paid once |
As klangfreund.com lists them, read 8 Oct 2026. The maker's own page has the final word.
Verdict
Klangfreund LUFS Meter offers real-time loudness measurement, target adjustment, and reference comparison across supported systems. Its two-channel scope, lack of offline analysis, and trial limits define where it fits.
Facts from Klangfreund LUFS Meter's own pages
- Demo privacy
- The manual says no personal data is required to obtain the demo. · klangfreund.com, 8 Oct 2026
- Headquarters
- Oberschan, Switzerland · klangfreund.com, 28 Sept 2026
- Intended users
- The product page names musicians, producers, audio professionals and videographers as users for the full edition. · klangfreund.com, 8 Oct 2026
- License activation
- A license can run on three of the customer's computers at the same time, and activations can be managed in the personal account. · klangfreund.com, 8 Oct 2026
- Loudness comparison
- It can equalize loudness when comparing a mix with reference tracks. · klangfreund.com, 8 Oct 2026
- Loudness delivery
- The product supports choosing a target loudness and adjusting the audio to it. · klangfreund.com, 8 Oct 2026
- Measurements
- The full edition includes integrated, momentary and short-term loudness, loudness range, and true-peak measurement. · klangfreund.com, 8 Oct 2026
- Mixing workflow
- It synchronizes meters across tracks to help create an initial “faders up” mix. · klangfreund.com, 8 Oct 2026
- Open source component
- Klangfreund makes its core loudness measurement algorithm available under the MIT license. · klangfreund.com, 8 Oct 2026
- Platform support
- It supports macOS and Windows, with Linux listed as experimental; Linux supports VST, while macOS and Windows support multiple plug-in formats including AAX, Audio Unit or VST3 as applicable. · klangfreund.com, 8 Oct 2026
- Purpose
- LUFS Meter is an audio plug-in for measuring and adjusting perceived loudness. · klangfreund.com, 8 Oct 2026
- Security
- The manual says the store uses an encrypted connection and that Stripe and Braintree handle sensitive card data under PCI DSS level 1 compliance. · klangfreund.com, 8 Oct 2026
- Standards
- The product lists compliance with standards including EBU R 128, ATSC A/85, ITU-R BS.1770-4 and OP-59. · klangfreund.com, 8 Oct 2026
- Support
- The maker directs support inquiries and issue reports to its contact form and provides an online manual and interactive in-product help. · klangfreund.com, 8 Oct 2026
- Trial limits
- The free demo runs on macOS, Windows and Linux and limits measurements to periods shorter than one minute. · klangfreund.com, 8 Oct 2026
Where Klangfreund LUFS Meter stands on Freedom251
- Audio Analysis Software#26 of 43