Dolby Music; Dolby Volume And Late Night - Classe Audio Sigma SSP Owner's Manual

Dolby Music

Parameters for playback in the Dolby PLIIx/PLIIz Music mode may be modified
to tailor your listening experience to your tastes. The Dimension control acts like
a front/rear fader whereby increasing the Dimension shifts the balance toward
the surround channels. The Center Width control adjusts the center versus left/
right channel balance to control how wide the center image is. Increasing the
number moves the balance toward the left and right channels and away from the
center. Panorama expands the front stereo image toward the surrounds to create
a more enveloping, wrap-around effect.
Dolby Volume and
Late Night Dolby Volume and Late Night are two related but different modes that
are mutually exclusive. Dolby Volume is available to address some of the
most common problems associated with real-world theater use. Modern
film soundtracks have a wide dynamic range, meaning the softest sounds
are quite a bit softer than the loudest sounds. With the volume turned up
loud enough to hear quiet whispers of dialogue, a thundering explosion
might be too loud to comfortably tolerate. There are also times when
watching a TV show where a highly compressed commercial comes on
and nearly blasts you from the room. These abrupt changes in level can
have you diving for your remote control, constantly turning the volume
up and down as the source signals vary.
The Dolby Volume Leveler uses advanced algorithms to detect these
changes and make adjustments so you can set the volume at a comfortable
level and leave it. The algorithm preserves dynamic range in a way that
simple compression techniques cannot. It may be set for Low or High,
depending on how aggressive you want the algorithm to be in keeping the
level within a reasonable range.
The Dolby Volume Modeler may be enabled to provide dynamic
compensation for the way in which human hearing changes at different
volume levels. With the Modeler enabled, an increasing amount of low-
and high-frequency compensation is applied as the playback volume is
reduced. The result is full and natural sound at any playback level.
Dolby Volume may be enabled on a per source basis choosing the Volume
button from the Setup Source page. You may elect to use it with your set
top box but not your Blu-ray player, for example. When accessed from the
Controls page, the Dolby Volume Leveler and Modeler functions may be
selected manually. When changing sources to one without Dolby Volume
enabled or, Dolby Volume will be switched off.
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