Multi-Channel Source Modes - Arcam AV9 User Manual

Dolby Pro Logic II: Dolby Pro Logic II decoding is designed to produce a 5-channel output from
two channel source material.
There are two different modes available in Pro Logic II: 'Movie' and 'Music' modes, which are
intended for use as their names suggest. Due to the different recording methods used for movies
and music, it is recommended that the correct decoding mode for your source material is used
to obtain the best results.
< Movie Mode: This is intended for use with 'cinematic' material, which is mixed and monitored in
a calibrated multi-channel environment. Movie mode is a 'fixed' mode that is designed to give a
similar sound when listening using a home cinema system to that obtained in a cinema.
< Music Mode: Stereo music is not designed for surround processing, although good surround
effects can be obtained through careful production. As the optimum decoding method varies
according to the recording, Music mode allows user adjustment of the processing characteristics.
Information about adjusting the Music mode by using 'Dimension' and 'Centre Width' controls
can be found in the 'Main Menu Screen 2' section.
Dolby Pro Logic IIx: Dolby Pro Logic IIx is an extension of the Dolby Pro Logic II matrix-decoding
method. The decoder allows the processor to derive seven outputs from a two or multi-channel
(up to 5.1 with EX) source to take better advantage of all amplifiers and speakers in a 7.1 setup.
There are two different modes available in Pro Logic IIx: Movie and Music modes. Due to the
different recording methods used for movies and music, you should select the correct decoding
mode for your source material.
Dolby Pro Logic Emulation: Dolby Pro Logic decoding is a legacy mode that is designed to produce
a five-channel output from two-channel source material. It should be used only when the
source material is encoded as Dolby Pro Logic; otherwise, we recommend the use of Dolby Pro
Logic II. This is because Pro Logic processing on straight stereo sources can sound muffled and
compressed.
DTS NEO:6: DTS Neo:6 provides up to six full-band channels of decoding from stereo material. The
AV9 will derive separate channels corresponding to the standard home theatre speaker layout.
< Cinema: A movie mode designed to reproduce a movie theatre environment. Neo:6 technology
allows various sound elements within a channel or channels to be steered separately, and in a
way which follows the original presentation naturally.
< Music: A music mode designed to produce a lively, high-integrity surround-effect from most two-
channel music sources from all available speakers. Neo:6 music mode expands stereo recordings
into the five- or six-channel layout without diminishing the subtlety and integrity of the original
stereo recording.

Multi-channel source modes

Digital multi-channel source material is normally provided as '5.1 audio'. The '5.1 channels' comprise of:
left, centre and right front speakers, two surround speakers and a low frequency effects (LFE) channel.
Since the LFE channel is not a full range channel, it is referred to as '.1'.
Surround systems decode and reproduce the 5.1 channels directly. Dolby Digital EX and DTS-ES
enhanced decoding systems create one extra rear channel from information buried in the two surround
signals of the 5.1 source. These EX and ES enhanced systems are sometimes referred to as '6.1'
systems. This extra surround back channel is normally reproduced through two separate loudspeakers,
creating a '7.1 system'.
5.1 Playback on 7.1 speaker systems
AV9
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