NAD T765 Owner's Manual - page 27

DOLBY DIGITAL PLUS

Dolby Digital Plus is the next-generation audio technology for all high-definition programming and 

media. It combines the efficiency to meet future broadcast demands with the power and flexibility to 

realize the full audio potential expected in the upcoming high-definition era. Built on Dolby Digital, the 

multi-channel audio standard for DVD and HD broadcasts worldwide, Dolby Digital Plus was designed 

for the next-generation A/V receivers but remains fully compatible with all current A/V receivers.

Dolby Digital Plus delivers multi-channel audio programs of up to 7.1 channels  and supports multiple 

programs in a single encoded bitstream with the maximum bit rate potential of up to 6 Mbps and 

the maximum bit rate performance of up to 3 Mbps on HD DVD and 1.7 Mbps on Blu-ray Disc. It 

outputs Dolby Digital bitstreams for playback on existing Dolby Digital systems. Dolby Digital Plus can 

accurately reproduce the sound originally intended by directors and producers. 

It also features multi-channel sound with discrete channel output, interactive mixing and streaming 

capability in advanced systems. Supported by High-Definition Media Interface (HDMI), a single-cable 

digital connection is possible for high-definition audio and video.

DOLBY TrueHD

Dolby TrueHD is a lossless encoding technology developed for high-definition optical discs in the 

upcoming era. Dolby TrueHD delivers tantalizing sound that is bit-for-bit identical to the studio master, 

unlocking the true high-definition entertainment experience on high-definition optical discs in the 

next generation. When coupled with high-definition video, Dolby TrueHD offers an unprecedented 

home theater experience with stunning sound and high-definition picture.

It supports bit rates of up to 18 Mbps and records up to 8 full-range channels individually with 24-

bit/96 kHz audio. It also features extensive metadata including dialogue normalization and dynamic 

range control. Supported by High-Definition Media Interface (HDMI), a single-cable digital connection 

is possible for high-definition audio and video. HD DVD and Blu-ray Disc standards currently limit their 

maximum number of audio channels to eight, whereas Dolby Digital Plus and Dolby TrueHD support 

more than eight audio channels. Note that the T 765 only supports 7.1 channel.

DOLBY DIGITAL EX

Using a Matrix decoder, this method creates the back channel (sometimes also called the “surround 

center”) by means of signals on the left and right surround channels recorded in Dolby Digital 5.1, 

reproduction being provided in Surround 6.1. This method should be selected with sources bearing 

the “Dolby Digital (double-D symbol)-EX” symbol, recorded in Dolby Digital Surround EX. 

With this additional channel you will experience improved dynamics and a better sensation of 

movement within the sound field. If media sources recorded in Dolby Digital EX are decoded with a 

Digital EX decoder, the format is detected automatically, and the Dolby Digital EX mode is selected. 

However, some media sources recorded in Dolby Digital EX can be detected as simple Dolby Digital 

media sources. In this case Dolby Digital EX should be selected manually.

NOTE

Please refer to the section ‘Listening Mode’ at the Main Menu discussions for a description of Pro 

Logic, PLIIx Movie, PLIIx Music and Stereo Downmix modes.

DTS

The Digital Theater System Digital Surround (simply called DTS) is a multi-channel digital signal format that 

can process higher data rates than with Dolby Digital. Although both Dolby Digital and DTS are 5.1 channel 

media formats, discs bearing the “DTS” symbol are thought to provide better sound quality due to the lower 

audio compression required. It also offers a broader dynamic, producing magnificent sound quality.

A DTS audio input can be configured relative to its format as follows

 Stereo: If the detected audio is of DTS format, you can default it to one of the following settings 

– NEO:6 Cinema, NEO:6 Music or None.

 Surround: If the detected audio is of DTS Surround format, you can default it to one of the 

following settings – NEO:6 Cinema, NEO:6 Music, Stereo Downmix or None.

 None: If ‘None’ is selected, the DTS signal will be defaulted to the ‘Stereo’ or ‘Surround’ settings set 

forth at the ‘PCM’ option. See discussion below about ‘PCM’.

NOTE

Please refer to the section ‘Listening Mode’ at the Main Menu discussions for a description of Stereo 

Downmix and DTS Neo:6 surround modes.

OPERATION

USING THE T 765 – SETUP MENU

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ENGLISH