MULTICHANNEL LOUDNESS

Controls

• Bed5.1 / 7.1 / 7.1.4 — The bed: 5.1, 7.1 or 7.1.4; it sets which channels are measured and their weights.
• Target-23 LUFS / -24 LUFS / -18 LUFS / -14 LUFS — The level the readout compares with: -23 LUFS (EBU R128), -24 LUFS (ATSC A/85), -18 LUFS or -14 LUFS.
• History10 s / 30 s / 1 min / 5 min — How much of the loudness history the graph shows.
• Auto ResetOff / On Play — On Play starts a new measurement every time playback starts.
• ResetReset / Reset — Any change clears integrated, LRA, maxima and the history.

Best uses

• Measure a surround or Atmos bed for a broadcast or streaming delivery
• Check a 5.1 film mix against EBU R128 or ATSC A/85
• Watch the true peak of every channel
• Compare the loudness of stems in a bed

Properties

ITU-R BS.1770-4 / EBU R128: every channel of the bed but the LFE is K-weighted and weighted by its place, 1.41 (+1.5 dB) for the speakers at 60 to 120 degrees (5.1 Ls/Rs, 7.1 sides) and 1.0 for the rest, then summed. Momentary, short-term, integrated (gated), loudness range (EBU Tech 3342) and the 4x true peak of every channel, LFE too. A 0 dBFS 997 Hz tone measures -3.01 LUFS on a front channel and -1.51 LUFS on a side, as the standard says. The audio passes through untouched. In REAPER set the track to 12 channels and route the pins to your bed. The player on this site plays pins 1 and 2 only.

Formats

• JSFXJSFX for REAPER, with REAPER's own sliders
• GFXJSFX GFX for REAPER, with its own interface
• VST3VST3 for any DAW
• CLAPCLAP for any DAW

Factory presets

ATSC A/85 -24 LUFS · Atmos Music -18 LUFS · Streaming -14 LUFS · 5.1 EBU R128 · 7.1 EBU R128 · Long Program 5 min · Reset on Play

Try it