Audio notes

Dolby digital

Dolby Digital playback in the cinema


Dolby digital Vs surround

  Dolby Digital Dolby Surround
Surround channels Stereo, complete range 20-20,000 Hz

Mono, limited range 100-7,000 Hz

LF (Low Frequence) EFFECT CHANNEL (20-120 Hz) No
Panning options Complete

Left / Right
Right / Left
Front / Back
Back / Front

Channels Six separate channels:
Each channel can carry a different signal
Four derived channels:
Only one dominant signal can be decoded at once


AUDIO TRACKS ON 35mm FILM


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by Bianca Medeccia

Technical instructions