Marantz SR5004 Manual page 30

The Outlaws' Guide to the Marantz SR5004
Source Direct
There is a tremendous amount of processing power available in the SR5004, but in
some cases it is more desirable to preserve clean a signal path as possible. With this in
mind, the Source Direct listening mode disables Acoustic EQ, bass management, and
M-DAX. Each incoming channel is sent directly to its output, untouched by the DSP
circuits. Analog inputs thus remain pure analog when in this listening mode, with only
volume control touching the signal.
Pure Direct
The Pure Direct listening mode is similar to Source Direct. In addition to what Source
Direct does, Pure Direct disables video output (composite, component, and HDMI) and
turns off the front panel display. As with Source Direct, this means that no bass
management, channel trim, speaker delay, or equalization is applied and analog inputs
remain analog.
(Dolby Digital) EX/(DTS) ES
Dolby Digital EX first appeared in theaters for Star Wars: Episode I in 1999. Dolby
Laboratories began licensing it for use in consumer electronics around late 2001. It can
be used with Dolby Digital 5.1 sources to produce a surround back signal, and some
Dolby Digital tracks include matrix information designed to be recognized by Dolby
Digital EX. In many of those cases, the source includes a "flag" that is meant to notify
the surround processor that Dolby Digital EX is available. Unlike Pro Logic IIx, it
produces a mono surround back signal.
Shortly after Dolby Digital EX appeared, DTS introduced a variation of DTS called
DTS-ES. A DTS-ES source includes six discrete audio channels, with the sixth being a
rear surround signal.
Dolby Pro Logic II
Dolby Pro Logic is a matrix surround processing technology that has been available in
consumer electronics since the 1980's, but it was replaced in 2001 by a significantly
evolved successor called Dolby Pro Logic II. Pro Logic II can expand a stereo source
into five discrete channels. It offers three different modes: Movie, Music, and Game.
Movie and Game use pre-defined guidelines to determine how a stereo or matrix
encoded signal is distributed throughout the five channels, but Music mode allows the
user to adjust three settings to fine-tune the manner in which it generates surround
sound. (See page 40 for those settings). When the SR5004 is operating with five or
fewer speakers, Pro Logic II will be available. When one or more surround back speaker
is available, Pro Logic II will be replaced by Pro Logic IIx in the listening mode options.
Dolby Pro Logic IIx
That brings us to Pro Logic IIx, which is an extension of Pro Logic II that first became
available in 2003. It adds two capabilities to Pro Logic II: the ability to generate a
maximum of seven channels (adding separate left and right surround back channels)
instead of five, and the ability to be used with a 5.1-channel source such as Dolby
Marantz SR5004 30
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