Marantz SR5004 Manual page 31

The Outlaws' Guide to the Marantz SR5004
Digital or DTS to extend them to 7.1 channels. All three of Pro Logic II's modes are
retained by Pro Logic IIx.
Dolby Pro Logic IIz
Unlike earlier processing modes in the Pro Logic family, Pro Logic IIz does not focus on
expanding audio into surround channels. Instead, Pro Logic IIz is a "Height" system that
extends audio into a pair of speakers located above the front channels. Pro Logic IIz
retains the surround processing features of Pro Logic IIx (expanding stereo sources into
multichannel as well as creating 7.1 channels from 5.1 channel sources). In addition to
that, it adds processing to produce the height channels above the left and right front
speakers that expand the traditional horizontal soundfield and create a greater vertical
front soundstage.
Pro Logic IIz processing will only be available if speakers are connected to the
"Front B/Height" speaker connections on the SR5004 and the height speakers are
enabled in the Speaker Setup menu.
DTS Neo:6
Neo:6 could be considered DTS's version of Dolby Pro Logic II. Like Pro Logic II, it is
designed to be used with stereo sources and it offers more than one mode. The Neo:6
Cinema mode is similar to Pro Logic II Movie, and Neo:6 Music is similar to Pro Logic II
Music. (See page 40 for Neo:6 Music settings.) Unlike Pro Logic II, Neo:6 supports six
discrete channels of audio (left, right, center, surround left, surround right, and a mono
surround back). Due to this sixth audio channel, Neo:6 can also be used with 5.1-
channel sources such as Dolby Digital and DTS to generate a mono surround back
signal.
Circle Surround II
This processing mode can be used to expand two-channel sources to multichannel,
similar to Dolby Pro Logic II and DTS Neo:6. CS II can be used with analog stereo,
PCM stereo, and Dolby Digital 2.0 sources. As with Pro Logic II and Neo:6, CS II offers
Cinema and Music modes. It also offers a Mono mode for use with mono mixes.
Stereo
The Stereo listening mode provides two possible processing scenarios. The first is to
preserve a stereo input with no surround processing. In this case, the stereo audio
signal will simply pass on to the signal processing. The second scenario is using Stereo
with a multichannel source, in which case this mode will downmix the multiple channels
into just two channels, followed in turn by signal processing.
Dolby Virtual Speaker
Virtual Speaker is a processing technology developed by Dolby Labs to simulate
surround sound using just two speakers. This mode is only recommended for systems
in which no surround speakers are available.
Marantz SR5004 31
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