User guide

Introduction

Surround. It re-creates 5.1 channel movie surround from the

two-channel source, using improved decoding techniques that

preserve the directness of the sound field, resulting in enhanced

image stability compared with standard Pro Logic decoding.

Pro Logic

Pro Logic is Dolby’s original processing mode for decoding

Dolby Surround encoded video and LaserDisc soundtracks, and

films on television. Such materials are usually identified by a

Dolby Surround symbol on the packaging, or displayed on the

film before the programme.

TV Logic

TV Logic provides user-adjustable steering, and is

recommended for use with TV broadcasts that are not surround

encoded, where Pro Logic may give reduced intelligibility.

PLII THX and THX Cinema

PLII THX and THX Cinema enhance Pro Logic II and Pro Logic to

replicate the sound of a dubbing stage or theatre, whether or not

the other equipment in your system is THX approved.

Ambisonics UHJ

Ambisonics UHJ decodes material specifically encoded for

surround sound reproduction, using a two-channel stereo-

compatible encoding. Recordings encoded in UHJ format are

available on CD from several sources including Nimbus Records

and York Ambisonics. Some radio broadcasts are also

broadcast in Ambisonics format.

Conventional stereo sources

The digital surround processor can also accept a conventional

two-channel source, such as music on compact disc or a video

soundtrack, and by analysing the information in the signal

separate the two-channel recording into multiple channels to

give better reproduction and a more stable spatial image.

Four alternative DSP presets are provided for reproducing

material originally designed for a conventional stereo pair of

speakers, and which preset you choose largely depends on your

own personal preferences.

All four presets use similar procedures to extract the surround

component of the original recording, which is delivered to the

rear surround speakers, and side surround speakers if present.