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Dolby SR-D: Difference between revisions
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Dolby SRD is easily distinguishable from [[Mono]], [[Dolby SR]], and [[Dolby A]] since the digital information looks like a cloud of dots between the sprockets. Because the sound data resides on a part of the film that touches the gears and rollers during the projection, the quality of the digital signal can quickly deteriorate if the film path is not kept perfectly clean, or if excess gate tension is applied to the print. That said, the Dolby Digital soundtrack is designed to survive several hundred plays with outstanding results. | Dolby SRD is easily distinguishable from [[Mono]], [[Dolby SR]], and [[Dolby A]] since the digital information looks like a cloud of dots between the sprockets. Because the sound data resides on a part of the film that touches the gears and rollers during the projection, the quality of the digital signal can quickly deteriorate if the film path is not kept perfectly clean, or if excess gate tension is applied to the print. That said, the Dolby Digital soundtrack is designed to survive several hundred plays with outstanding results. | ||
When inspecting an SR-D print, it is advisable to occasionally look at the SR-D soundtrack with a loupe for any thick base or emulsion scratches. If there is excessive wear on the SR-D track, you should keep a close eye on the SR-D track and watch for dropouts. If the SR-D track is constantly failing (reading "F" on the processor) because the signal quality is too poor, the processor will revert to Dolby SR. The change in sound quality from SRD to SR is very apparent, so if the film is constantly switching between SRD and SR it is preferable to switch the sound format to SR and leave it in that format. | |||