XD20 Installation and Operating Guide
Version 1.1
Document # 9301H264001.1
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4.
Selected XD20 units with CSS or Video Options may be configured with the soundtrack audio
capability disabled. When the soundtrack audio is disabled, XD20 will not play DTS audio
soundtrack with film. However, the unit will still function for video sound playback or external
S/PDIF input.
If an XD20 unit does NOT have soundtrack capability, the following message will display.
Main menu
→
Playback
→
Film
→
Soundtrack
4.5. Guide for a Seamless Change-Over
When you are running a DTS movie with dual projectors, the picture and sound may not change at the
same time during a change-over. The reason is that as soon as the first frame of action reaches the picture
aperture on the incoming projector, the DTS Digital Sound
®
will change over to that reel. DTS Digital
Sound
®
changes independently of the projector’s douser position. Change-over anomalies are most
evident on movies that have very tight editing / scene-change tolerances from the end of one reel to the
start of the next reel.
When this occurs, perform one of the adjustment procedures below.
4.5.1. Sound Changes Before Picture
When threading the incoming projector, roll down the film to a greater number of feet. If you normally
thread to “8”, try threading to “9” or “10.” Keep adjusting the roll-down setting until the picture changes
with the sound. Also, try hesitating a second before starting the incoming projector on the first cue.
4.5.2. Determining Roll-Down
Adjusting the roll down setting is a judgment call. Base it on the time delay of the picture vs. sound. One
second of delay equates to 24 frames, or 1.5 feet.
