Anthem AVM 40 Operating Manual
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Brand: Anthem
Category: Amplifier , Home Theater System
Type: Operating manual for Anthem AVM 40
Pages: 86 (2.39 Mb)
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• Adaptive Decorrelation – In a movie theatre, a large number of surround speakers help create an
enveloping surround sound experience, but in a home theatre there are usually only two speakers.
Unless you are using properly positioned dipoles, surround speakers can sound like headphones
that lack spaciousness and envelopment – they will also collapse into the closest speaker as you
move away from the middle seating position. Adaptive Decorrelation senses the presence of
identical surround channels (mono) and slightly changes one surround channel's time and phase
relationship with respect to the other. This expands the listening position and creates – with only
two speakers – the same spacious surround experience found in a movie theatre. Adaptive
Decorrelation does not operate when the surround channels are different, as is often the case in
discrete multichannel source material.
• ASA (Advanced Speaker Array) – ASA is a proprietary THX technology that processes the sound
fed to the two surround and two rear speakers to provide an optimal surround sound experience.
When you set up your home theater system using all 7.1 speaker outputs (L-Front, Center, R-Front,
R-Surround, R-Rear, L-Rear, L-Surround, Subwoofer), placing the two Rear speakers close together
will provide the largest sweet spot. If for practical reasons you have to place the Rear speakers
further apart, you will have to go to the Listener Position menu (section 3.3) and choose the setting
that most closely corresponds to the speaker spacing to re-optimize the surround soundfield.
Depending on source material and speaker configuration, THX processing is available as follows:
THX Cinema: 5.1 to 7.1 output with 2.0- and 5.1-channel movies (see overview that follows)
Processing: Re-Equalization, Timbre Matching, Adaptive Decorrelation (if applicable)
When THX Cinema is selected, Dolby Pro Logic IIx Movie is automatically
engaged. Alternatively, Dolby Pro Logic or DTS Neo:6 Cinema may be selected.
Other Surround Modes are not available and do not appear when pressing MODE.
THX Ultra2 Cinema: 7.1 output with 5.1-channel movies
Processing: Re-Equalization, Timbre Matching, Adaptive Decorrelation, ASA (Cinema)
THX Ultra2 Cinema mode plays 5.1 movies using all 7.1 speakers giving you the
best possible THX movie watching experience with 5.1 program material. In this
mode, ASA processing blends the L/R-Surround speakers and L/R-Rear speakers
providing the optimal mix of ambient and directional surround sounds.
THX MusicMode: 7.1 output with 5.1-channel music (including DVD-Audio, multichannel SACD)
Processing: Timbre Matching, Adaptive Decorrelation, ASA (Music)
THX MusicMode can be selected when playing multi-channel music. In this mode
THX ASA processing is applied to the surround channels of all 5.1 channel
encoded music sources to provide a wide stable rear soundstage.
THX Games Mode: 7.1 output with 2.0- and 5.1-channel games
Processing: Timbre Matching, ASA (Games)
Game audio is mixed and monitored in a different environment than that of music
and movies. The interactive nature of the audio requires a playback system which
can provide 360 degree panning while preserving the ambient nature of
background sound elements. When playing back 5.1 games, THX Games Mode
may be engaged. Suitable sources are Dolby Digital 5.1 and DTS 5.1 game sources.
If THX Games Mode is engaged with 2.0 input, the source is first converted to 5.1
via Pro Logic IIx Game mode.
4. OPERATION continued …