14 Free Fest Trailer and Demo LUFS Loudness Meter and Normalization Tools (2026 Q3)
Trend-timed <span style="font-weight: 600;">May–June 2026</span> bookmark list for fest <span style="font-style: italic;">trailer and demo</span> loudness—meters and normalization lanes distinct from the <a href="https://gamineai.com/blog/14-free-audio-loudness-lufs-meter-tools-fest-trailers-demos-2026">fourteen-tool tutorial article</a>. Targets <span style="font-weight: 600;">−16 to −14 LUFS</span> trailers, <span style="font-weight: 600;">−23 LUFS</span> dialogue stems; ship <span style="font-style: italic;">loudness_receipt_v1.json</span> before October creative locks.
Free desktop meter—integrated, short-term, and true-peak readouts for trailer WAV masters before MP3/AAC delivery.
Best for: first-pass trailer QA
Pro tip: measure WAV, not re-encoded store upload.
ffmpeg — loudnorm filter
Open SourceTwo-pass EBU-style normalize for batch renders—`loudnorm=I=-16:TP=-1.5:LRA=11` starting point for stereo trailers.
Use for: CI on exported WAV
Pair with channel-layout help when stereo tags lie
Audacity
ToolNormalize + Loudness Normalization effects for quick menu-loop fixes without a DAW license.
Best for: solo dev trailer edits
REAPER (evaluation)
ToolFull mix bus with JS: Loudness Meter / SWS extensions—fest contractors often deliver REAPER projects.
Use for: stem handoff review
Capture-side monitoring when recording gameplay for trailer cuts—catch clipping before export.
Best for: gameplay capture lanes
Loudness Penalty
Web ToolStreaming platform preview—see how hot masters translate on YouTube/Spotify-style loudness normalization (marketing cuts, not legal Steam spec).
Use for: social trailer variants
Dynamics + spectrum for taming trailer hits without crushing dialogue—common indie mastering plugin.
Best for: limiter staging
Orban Loudness Meter (legacy)
ReferenceReference meter lineage—useful when contractors cite Orban readouts; cross-check with Youlean/ffmpeg.
Use for: vendor report reconciliation
Trailer finish lane with loudness track presets and `-23` dialogue norms for mixed VO/SFX.
Best for: final trailer bounce
Godot 4 — Audio buses
Official DocsIn-engine bus meters for demo menu vs combat lanes—document peak targets in `LOUDNESS_TARGETS.md`.
Use for: Godot fest demos
Unity — Audio Mixer
Official DocsExposed dB + attenuation for menu/music/SFX groups—pair with [menu FPS cap opinion](https://gamineai.com/blog/fest-demos-should-cap-menu-frame-rate-2026-opinion) so idle menus do not mask loudness mistakes.
Best for: Unity 6 fest builds
FMOD Studio — Loudness meter
MiddlewareMiddleware profiling for adaptive music spikes in short demos—catch combat stems that blow past trailer levels.
Use for: FMOD-driven titles
See WebGL silent-first-scene help if banks load but stay flat
EBU R128 summary (reference)
ReferenceSpec anchor for integrated loudness vocabulary—indie targets above are simplified; cite EBU when contractors deliver broadcast-style stems.
Use for: contract language
Step-by-step fest prep with `loudness_receipt_v1.json`, beginner + developer paths, and A/B protocol—this resource is the link bookmark; that article is the workflow.
Start here after picking tools above