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The absolute system refers to the notion that most people thinking of the
number 0 as meaning nothing, e.g., no sound at all. In this system, 0 means
“sound off” and larger numbers indicate high volumes. While this is intuitive,
the only way you have any idea how loud a particular setting is would be
through experience.
In the relative (THX) system, there is a calibrated, reference volume at which
movies are played in theaters, which is duplicated in your environment and
referred to as “0 dB.” Regardless of how large or how small the theater, a setting
of “0 dB” is always the same, known volume. Changes from that volume level
are shown as either positive (louder) or negative (quieter). People who have spent
any time making recordings will recognize that this is similar to the notion of “0
dB” on a record level meter.
In any event, you may choose either system depending on which one makes the
most sense to you personally.
Dolby/DTS setup The SSP-600 incorporates both Dolby Pro Logic II and DTS Neo:6
technologies for converting a two-channel signal into an enjoyable multichannel
listening experience.
While they differ in the details of their implementation and in the subjective
result, on a conceptual level they do the same thing: they analyze the
information embedded in two-channel recordings, looking for clues that
can indicate how the sound in those recordings might best be redistributed
to the various speakers in a multichannel system, so as to simulate a discrete
multichannel recording. Each has one or more adjustments available to let
you customize the performance of the processing to best suit your personal
preferences.
Dolby Pro Logic II Dolby Pro Logic II has three user-adjustable parameters.
Panorama is a simple on/off toggle (highlighted means “on”) that will present
a wider and deeper front soundstage. This effect is somewhat signal-dependant,
meaning that it is more pronounced with some recordings and less so with
others. With a good recording, however, the effect an be quite dramatic.