AV Stream Checker — Novasound AV Tools

Video Monitor

No video feed

NO SIGNAL

Waveform

Lip Sync Recorder

Framerate

Detected FPS: — Analyzer FPS: auto Mode: waiting

Clap in front of camera · Max 30s · Auto-loads in analyzer below

00:00

Audio Levels

WAITING FOR SIGNAL —

Momentary

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LUFS-M

Short-Term

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LUFS-S

Integrated

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LUFS-I

True Peak

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dBTP

RMS

—

dBFS

LUFS-M —

LUFS-I —

RMS —

True Peak Headroom — · 20s hold: —

Loudness Range (LRA) 120s window —LU

Momentary Loudness History120s

Drop your recording here or click to browse

WebM · MP4 · MOV · any video file

After recording a clap, the file auto-loads here · Or drop any existing video

Platform / Standard	Integrated Loudness	Max True Peak	LRA	Notes
EBU R128 — Broadcast	−23 LUFS	−1 dBTP	≤18 LU	European broadcast standard. Mandatory for EBU members.
ATSC A/85 — US Broadcast	−24 LUFS	−2 dBTP	≤20 LU	US/Canada. Dialog-gated. Equivalent to EBU R128 in practice.
AES Streaming	−18 LUFS	−1 dBTP	—	General streaming recommendation by AES.
YouTube	−14 LUFS	−1 dBTP	—	Normalises to −14 LUFS. Louder content turned down, not up.
Vimeo	−14 LUFS	−1 dBTP	—	No loudness normalisation applied server-side.
Zoom / Teams	−12 LUFS	−1 dBTP	—	Conferencing codecs compress aggressively.
Podcast / Spoken Word	−16 LUFS	−1 dBTP	≤10 LU	Apple Podcasts / Spotify normalise to −16 LUFS.
Spotify / Apple Music	−14 LUFS	−1 dBTP	—	Loud masters will be turned down to match target.

Lip Sync workflow : Record a hand clap · Set I on the audio clap transient · Set O on the video clap frame · Read the delay in ms · Apply as audio offset on your streaming encoder or mixer.

LUFS vs dBFS : LUFS uses K-weighting filter for perceptual loudness. True Peak uses inter-sample peak detection (4× oversampling) — more accurate than dBFS for detecting codec clipping.