Citation Stereo Receiver - Manual (Page 52)

Selecting Surround Modes
When you select a source to watch or listen to, the last Surround mode used with that source will
automatically be chosen. You may change the Surround mode at any time in several ways. One way
is to press the buttons on the remote control; press the
Dolby Mode Selectors button ¬ for Dolby
Pro Logic, which is always available. If you are using a source for which Dolby Digital is an appro-
priate choice, a second press of the same button will switch to that mode of operation. Pressing the
6-Axis , Stereo or Party Pre-programmed Mode Selectors selects these modes, whose settings are
listed starting on page 51 of this manual. Another way to change the Surround mode is to press
either the
Cust 1 , Cust 2 or Cust 3 Custom Mode Selectors ∆ on the remote control. These but-
tons are factory preset to Surround mode profile settings which have been found most pleasing to
typical users. A typical Surround mode profile includes the mode type, such as 70mm, or Jazz, high-
and low-frequency equalization settings, adjustments for surround and center speaker levels, amount
of time the signal is delayed before being sent to the surround speakers (an important aspect of
derived surround sound decoding), and the setting for Panorama, a special feature that can be set to
expand the width of program material in three user-selectable steps.
Note: The 5.0 will only allow appropriate choices of Surround mode; it will, as example, ignore
any “requests” for the Dolby Digital or DTS modes when the chosen program source cannot or is
not providing the appropriate signal.
Surround Mode Definitions
Movie Modes
Dolby Pro Logic is the consumer version of the system used in theaters to separate two channels of
sound from a movie sound track into separate left, center, right and surround channels. In this mode,
the surround channel is mono, and limited in bandwidth. Pro Logic is a good starting point when you
are choosing a Surround mode to use when listening to a movie or a surround-encoded broadcast or
video game.
70mm is a Jim Fosgate design exclusive to Citation, based on Dolby Pro Logic. To increase the
excitement level of surround-encoded materials, the 70mm mode uses Citation's ultra fast decoding
logic and extended bandwidth in the surround channels. In this mode the back (surround) channels
are capable of response up to 12kHz, rather than the lower limit of 7kHz mandated for Pro Logic
circuits by Dolby Laboratories. Although even higher bandwidth is possible in the surround chan-
nels, 12kHz was chosen to preserve spectral balance in your listening room (A higher frequency
range for the surrounds is not advisable as the listener is typically located closer to the speakers at
home than they would be in a mover theater.) Finally, there is some controlled blending of the
left/right front-channel information into the left and right back channels. This delivers an increased
sense of spaciousness from most sound tracks.
The 70mm mode is excellent for use with any recording or broadcast that contains matrix-sound
encoding.
6-Axis , described fully in the “Music Modes” section which follows, is an excellent surround mode
for movies, as well.
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Operating the Citation 5.0