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Check an FPV Film for Missing Sound in Mono

Civil application reference · Film sound

Keep the cue when channels combine

Imagine a completed, permitted FPV venue film with original narration and a scene-change cue. Its recipient requires mono playback: combine both channels, not discard one.

Assume equal gains at one instant; arbitrary units, not a waveform. Left +0.4 plus right −0.4 gives 0.

Opposite contributions can cancel. This one-instant model cannot diagnose a soundtrack; reduced stereo width alone is not failure.

Fictional listening finding

“Entrance-to-hall transition: narration remains intelligible, but the scene-change cue heard in stereo disappears in mono.”

Send that passage and sound identity to the mixer for revision. Recheck the revised passage in stereo and summed mono, including speech clarity, cue presence and balance.

Basis: iZotope's mono and phase guidance. No audio was played; retained workshop photographs and video do not demonstrate this finding.

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