User`s manual

Dolby

CP650 Digital Cinema Processor User’s Manual Reference Information

C-2

Figure C-2 Identifying Types of Film Sound Tracks

There is no way to tell by visual inspection if a stereo print is Dolby A-type or

Dolby SR encoded. The majority of stereo prints are Dolby SR encoded. If you are in

doubt, listen to the track and compare playback quality in formats 04 and 05. If you

are unable to do this before the show, play the film in format 04, Dolby A-type.

C.2 About Dolby Digital Surround EX

CP650 operating system software versions 1.1.3.0 and higher (2.1 and higher if your

system is equipped with a Cat. No. 790 card) add Dolby Digital Surround EX

film

soundtrack playback capability, along with support for decoding AES/EBU input

signal bitstreams.

To take advantage of these new features, the CP650 must contain a Cat. No. 790 (or

earlier Cat. No. 794) card. If your CP650 does not have this card installed, an upgrade

kit, the UEX/650, is available. Contact your dealer for installation information.

Note: Your CP650 must be capable of decoding Dolby Digital film soundtracks to

play films with Dolby Digital Surround EX soundtracks. If your cinema processor is a

Model CP650SR, a Cat. No. 773 Dolby Digital decoder board must be installed. The

UD/650 upgrade kit is available for this purpose. Contact your dealer for information.

Dolby Digital Surround EX, format 13, can be assigned to a front-panel button.

Dolby Digital Surround EX adds a third surround channel to digital film sound, a

concept first envisioned by sound designers at Lucasfilm’s Skywalker Sound

postproduction facility. It gives sound mixers a new level of creative freedom.

Dolby Digital Surround EX is fully compatible with all current 5.1 digital sound

formats and theatre systems. Prints that use it play normally with current systems, and

provide the extra surround channel when played using a CP650 cinema processor

equipped with a Cat. No. 790 or 794 board.

Analog Stereo Print

Clear differences between

channels will be seen in

some places along the track.

Mono Print

Both tracks are the same.

Dolby Digital or Dolby Digital

Surround EX Print

The digital data blocks are clearly

visible between perforations next to the

analog track. The analog track is Dolby

SR encoded.