How to Use Sonoris Meter for Accurate Loudness Measurement
Accurate loudness measurement ensures mixes translate consistently across platforms and meet delivery standards. Sonoris Meter is a precise, straightforward tool for measuring LUFS, true peak, and short/short-term loudness. This guide walks through setup, measurement workflows, interpretation, and delivery checks.
1. Install and set up
- Install Sonoris Meter as a plugin (VST/AU/AAX) on the master bus of your DAW or insert it in your monitoring chain.
- Use a single instance on the main output to measure the summed stereo signal.
- Ensure your DAW playback sample rate and bit depth match your project settings (common: 48 kHz, 24-bit).
- Disable any analysis smoothing or external metering in the DAW that could alter the signal that reaches Sonoris Meter.
2. Calibrate levels and meter ballistics
- Set your monitor gain to a sensible reference (e.g., -14 dBFS RMS for monitoring if you use that reference). Sonoris Meter reads digital levels; monitor volume is for your ears.
- Choose metering mode: Integrated LUFS for program loudness, Short-term (3s) for dynamics insight, and Momentary (400 ms) for transient behavior.
- Enable True Peak metering if you need to check inter-sample peaks (recommended for broadcast/streaming delivery).
- If Sonoris Meter offers K-weighting or ITU-R BS.1770 options, select the standard required by your target (most services use ITU-R BS.1770 / EBU R128).
3. Measure during playback
- Play your full program (complete track or final master) from start to finish to get a valid Integrated LUFS value.
- Watch the Integrated LUFS—this accumulates over time and stabilizes once the full duration is analyzed.
- Use Short-term and Momentary meters to inspect sections that may push levels or cause loudness inconsistencies.
- Check True Peak during louder passages to ensure no inter-sample clipping (keep below service-specific limits, commonly -1 dBTP or -2 dBTP).
4. Interpret results and adjust
- Integrated LUFS: Compare against your target (examples: -14 LUFS for many streaming platforms, -16 to -18 LUFS for some broadcast standards, or -9 to -6 LUFS for loud commercial masters). Choose the correct target per delivery.
- Short-term & Momentary: Use these to identify inconsistent loudness or overly compressed sections. Reduce compression or automation where needed.
- True Peak: If exceeding the target, reduce peak level or apply a true-peak limiter set to the required ceiling (e.g., -1 dBTP).
- Loudness range (if shown): Higher LRA means more dynamic range. For broadcast you may need to reduce LRA via gentle compression or automation.
5. Common workflows
- Podcast/Voice: Aim for Integrated LUFS around -16 to -14 LUFS, low LRA, and True Peak ≤ -1 dBTP. Use gentle compression and clip gain to even levels, then re-check.
- Music Streaming: Aim for platform target (often -14 LUFS). Use mastering compression sparingly; prefer limiting to control peaks while preserving dynamics.
- Broadcast: Follow specific broadcaster specs (e.g., EBU R128: -23 LUFS integrated in Europe). Use program gating if required and set true-peak limits per spec.
6. Batch or realtime checks and reporting
- For multiple files, render tracks and load them into a session or standalone Sonoris Meter instance that supports file analysis (if available) for batch measurements.
- Record Integrated LUFS, True Peak, and LRA for each deliverable in a short checklist: File name | Integrated LUFS | True Peak | LRA.
- If delivering to clients or platforms, include those measured values in delivery notes.
7. Troubleshooting tips
- Integrated LUFS not stabilizing: Ensure you played full program length; restart meter or re-open session if it lingers.
- Sudden high true peaks after limiting: Check for inter-sample peaks; use a true-peak-aware limiter and lower ceiling.
- Meter discrepancy vs. other tools: Confirm both tools use the same ITU-R BS.1770 version and true-peak measurement; differences in gating or algorithms can cause small offsets.
8. Final checklist before delivery
- Integrated LUFS meets target.
- True Peak below required ceiling.
- No audible distortion or inter-sample clipping.
- Loudness range appropriate for the medium.
- Exported file sample rate/bit depth matches delivery spec.
Using Sonoris Meter consistently as described will give you reliable loudness readings and help you meet platform and broadcast loudness requirements with confidence.
Leave a Reply