Audio Design Associates Cinema Reference Mach II PTM-8150 - Manual (Page 81)

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Two Channel Modes & Indicator Lamps
Dolby Surround 2.0
While many discs offer an alternate stereo Dolby Digital track, often
older films on DVD only feature this track, as these movies were
never mastered in more than two channels. The Cinema Reference
Mach II indicates this type of audio track by illuminating only the L &
R Input channel lamps along with the Dolby Digital lamp. If you see
this combination when playing a DVD of a more current film, one
which most likely features the more advanced 5.1 mix, chances are
that you may have selected the wrong audio track (Language) in the
DVD’s title menu. Prior to proceeding with the film, confirm the proper
audio track selection. Please note, that the 2.0 indication may occur
as the movie loads, prior to the opening scene, even if you have
made certain that the 5.1 track has been selected.
Because Dolby Surround 2.0 is only a two-channel mix, the Cinema
Modes are no longer available. Here, you now have the ability to
select from the 27 Two-Channel Mode options.
PCM Digital Audio
PCM digital audio (Pulse Code Modulation) is the stereo audio that
is digitally encoded onto CDs and laser discs, as well as the audio
output of some broadcast receivers. For standard PCM digital au-
dio, no prior decoding takes place to derive the stereo signal (as in
Dolby Surround 2.0). Again, the Cinema Reference features 27
decoding modes for PCM digital audio.
Analog Audio (Stereo or Mono)
Just like PCM digital audio, the same 27 Two-Channel modes avail-
able for PCM digital audio (and Dolby Surround 2.0) are available
here as well.
When the Cinema Reference does detects a Dolby or DTS two-channel mix as well as when the unit
simply detects no encoding at all (complete absence of a Dolby or DTS bit stream), the Cinema modes
are defeated and the two channels modes are engaged. The Input Channel lamp will illuminate just
the L & R channel lamps. If you are on an analog input, the Digital symbol will turn off. Here, the
following modes are available and the output lamps correspond to the mode selected.
STEREO - This two channel mode will active only the left and right speakers along with the subwoofer.
The L, R, and SUB Output channel lamps will also illuminate.
MONO - In this mode, only the center channel and the subwoofer are active. If a stereo signal is in
play, both right and left channels mix to mono and play through the center speaker. The C and
SUB Output channel lamps are on.
DTS NEO 6 - DTS Neo 6 is one of the few Two Channel modes that will permit you to engage your
entire speaker array (7.1) when playing a two channel source. Here, the L, C, R, SUB, LS, RS,
SBL, and SBR Output channel lamps are on and all speakers are active.
DTS NEO6+THX - This mode is the same as DTS Neo 6 and includes the addition of THX enhance-
ments. Here, the L, C, R, SUB, LS, RS, SBL, and SBR Output channel lamps are on, all
speakers are active, and the THX symbol is illuminated.
Dolby Surround 2.0 Pro Logic Movie
PCM Digital Audio Pro Logic Movie
Analog Audio Pro Logic Movie