Test browser codec support, map channels, and play spatialized tones. Upload your own WAV/MP4 (Channel 5) to the player without sending files to a server.
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Capabilities
Dolby Digital Plus (EC-3) probe
Checking browser support…
Uses navigator.mediaCapabilities.decodingInfo for audio/mp4; codecs="ec-3".
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Player
Upload via Channel 5 or paste a URL below
Passthrough note: For true Dolby Atmos (object-based), use Safari/Edge with bitstream passthrough.
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Channel ID
L/R/C/LFE/LS/RS/LB/RB + heights
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Sweeps & Noise
Pink/white noise + slow sweeps
Slot 3: Pink noise for level matching (stereo + multichannel).
Slot 4: Slow sweep 20–20k with visual scale overlay.
Note: Leave headroom note for Atmos (–4 to –6 dBFS recommended).
Pink noise placeholderSweep placeholder
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Reference Clips
Music + film moments
Slot 5: Atmos music demo (choral or spatial electronic).
Slot 6: Movie Atmos moment (rain overhead, flyovers).
Slot 7: Stereo reference mix with DR notes.
Atmos music placeholderFilm moment placeholderStereo ref placeholder
Routing Notes
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Playback
Use browser-native player first (mp4/webm). Note if Atmos metadata strips out; provide alt download link.
Mark files that require external players (e.g., MKV + TrueHD Atmos).
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Future hooks
Add gain slider + LUFS readout if lightweight meter is available.
Add speaker layout diagrams for 5.1/7.1/Atmos with highlight synced to callouts.