NAD T 754 owner manual Displaying the Signal Mode, Selecting Listening Modes, Dts

USING THE T 754

•Enhanced-Stereo 2 (ST2)

All recordings reproduced in stereo via the surround speakers only (plus subwoofer, if any), assuming these are configured in the current <Speakers Setup>. ST2 can prove useful in certain late-night or very low-volume listening situations.

The following Surround Sound Modes require a specially encoded signal that must be present in digital format to be decoded by the T 754. These modes are automatically switched on when the appropriate data stream is detected selected in the setup menu of the source media.

•Dolby Digital

•Dolby Digital EX

•Dolby Digital Surround Sound EX

•DTS

•DTS ES Matrix

•DTS ES 6.1

Digital recordings in Dolby Digital or DTS formats are reproduced via the channels employed in the original recording (up to the maximum channels present in the current <Speaker Settings> setup).

NOTE: The DVD player must be sending a Dolby Digital or DTS bit-stream from its digital output. Your DVD player probably includes its own setup menu that (among other things) lets you select the default bit- stream format, and usually includes an “Auto” setting that directs the player to choose the Dolby Digital/ DTS signal whenever these are available. In a few cases, you may have to set the player’s bit-stream manually to “DD/DTS” or an equivalent. In the case of DVDs that carry both Dolby Digital and DTS, you will select one or the other from the disc’s (not the player’s) main menu.

Note also that while most Dolby Digital recordings are 5.1-channel surround productions, older examples may be multichannel, 2-channel, or even monaural; the T 754 will automatically reproduce the Dolby Digital signal with the maximum number of channels available.

Both Dolby Digital/EX and DTS/ES 6.1-channel recordings are reproduced using the surround back channel, if present in the current Speaker Settings setup; additionally, the T 754 creates surround-back signal from non-EX/ES, 5.1-channel Dolby Digital and DTS recordings.

Dolby Digital EX creates six full-bandwidth output channels from any 5.1-channel Dolby Digital recordings. The very best results occur with movies or other programs bearing the Dolby Digital Surround EX mark, which are produced to take full advantage of this playback mode.

The table below indicates which listening modes are available with the two types of audio signal sources: digital- or analog-input 2-channel (whether the actual signal is monaural, stereo or surround-encoded), and digital-multichannel (Dolby Digital or DTS). Where a listening mode is not available to a given signal source, it will not appear in the <Listening Mode> selection rotation.

2-ch analog or PCM	Multi-ch. (DD/DTS)
Stereo	Downmix
EARS	--
--	Dolby Digital/EX or DTS/ES
Dolby Pro Logic II	--
DTS Neo:6	--
Matrix 7.1	--
Enhanced Stereo I	Enhanced Stereo I*
Enhanced Stereo II	Enhanced Stereo II*
	* downmixed signals

DISPLAYING THE SIGNAL MODE

Keying the front panel’s DISPLAY or HTR 2 remote's [DISP] key will display on the VFL the channel-mode of the currently selected input signal, in the format “front/surround.subwoofer” (see “5 DISPLAY” in the “Front Panel” section).

The following table shows examples of displays seen with various signal types:

Source	Readout/OSD
Analog	Analog
Digital PCM/HDCD	Digital PCM/HDCD
Multichannel (Dolby Digital)	Dolby D 3/2/.1 (full surround)
	Dolby D 3/1/.1
	Dolby D 2/0
	etc.
Multichannel (DTS)	dts 3/2/.1 (full surround)
	dts 3/1/.1
	dts 2/0
	etc.

SELECTING LISTENING MODES

Keying the HTR 2 remote's [SURR MODE] button steps through each of the T 754’s Listening Modes available to the current input signal. It also momentarily displays the Listening Mode in the OSD.

NOTE: Changing the type of input signal may automatically change the Listening Mode: If the new signal is a Dolby Digital or DTS recording, it will automatically invoke its native mode. The reverse is also true if Dolby Digital or DTS was previously selected.

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ENGLISH