Other Settings; Speaker Level Et; Group Delay Et; Dynamic Range - Rotel RSX-1550 Owner's Manual

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• To select DSP multichannel modes for 2-channel analog
recordings. You can also step through the DSP options (DSP 1-4,
5CH, 7CH) by repeatedly pressing the DSP button on the front panel.
Directly select 5CH mode by pressing the 5CH button on the remote.
Directly select 7CH mode by pressing the 7CH button on the remote.

Other Settings

Speaker Level
ET
The levels of all channels should be calibrated using the TEST TONE
procedure during the initial setup. You can make a temporary change
in the relative volume of the center, surround, center back, or subwoofer
channels using buttons on the remote control or the front-panel controls.
These temporary adjustments only remain in effect until a different input
is selected or until the receiver is turned off.
To adjust speaker levels using the remote:
1. Press a selection button on the remote to select a channel (or pair of
channels) for adjustment. Press the C button to adjust the CENTER
channel. Press the S button to adjust the SUBWOOFER channel. Press
the R button to adjust the rear SURROUND or CENTER BACK channels
(each press of the R button toggles between the SURROUND channels
and the CENTER BACK channels). The selected speaker and its current
setting appear briefly in the display.
2. Use the UP or DOWN buttons on the remote to adjust the output level
of the selected channel(s).
Note: If no level adjustment is made for 10 seconds, the levels
revert to the default calibrated settings.
As you select a speaker in the above adjustments, you may notice an
addition choice, "group delay". See the following for an explanation of
this feature.
Group Delay
ET
The SPEAKER adjustments (described above) can also be used to make
a temporary adjustment to the group delay or "lip-synch" delay. Group
delay delays the overall audio signal (to all speakers) by a specified
amount to correct for situations where the video and audio signals are
out of synch. This can occur with upconverted digital TV signals or when
trying to match a radio broadcast with the video from a sports event. The
settings range from 0 to 500 milliseconds in 5ms increments.
Like the speaker settings, this is a temporary adjustment that overrides
the permanent default setting for a video source until a different input
source is selected or the unit is turned off.
To adjust group delay using the remote:
1. Press the C button on the remote twice.
2. Use the UP or DOWN buttons on the remote to adjust the amount of
delay applied to all channels.

Dynamic Range

L
Dolby Digital recordings are capable of wide dynamic range (the
difference between the softest and loudest sounds). In some cases, this
may tax amplifiers and/or speakers. In other cases, you may want to
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reduce the dynamic range when listening at low volume levels. This is
particularly useful in order to keep dialog loud enough to be intelligible
while avoiding excessively loud sound effects. Dolby Digital dynamic
compensation is a sophisticated feature that allows you to adjust
the dynamic range while still preserving fidelity. The actual amount
of compression relies on instructions embedded in the Dolby Digital
recording and varies to best suit the specific program content.
There are three dynamic range settings available for Dolby Digital
recordings:
• MAX: full dynamic range.
• MID: slightly reduced dynamic range, roughly comparable to the
signal from a compact disc.
• MIN: more heavily reduced dynamic range, but still comparable to
the signal from a typical VHS Hi-Fi recording.
To adjust dynamic range: Press the DYN button on the remote
repeatedly until the desired setting appears in the front-panel display.
This setting remains in effect for all Dolby Digital program material until
it is changed.
Note: The dynamic range compensation feature is only available
in Dolby Digital mode. The setting is ignored with all other types
of recordings.
Contour/Tone Settings
TX
The contour controls (available on the remote control) can be used to
make a temporary change to the high or low frequency content at the
frequency extremes. Adjustments to the contour settings are temporary;
they remain in effect only until a different source input is selected or the
unit is turned off. Permanent settings can be made using the Contour
Setup menu.
The settings can be adjusted up or down by a maximum of 6dB.
Changing the high frequency contour (HF) increases or decreases the
treble. Changing the low frequency contour (LF) increases or decreases
the bass content. The changes affect only the speaker or speaker(s)
selected for adjustment in the Contour Setup menu. The settings are
shown on the front-panel display as you adjust them.
To adjust the contour settings from the remote:
1. Press the TONE button on the remote. Either LF or HF appears in the
OSD and front-panel displays, depending on which adjustment is
currently active. Press the TONE button again to toggle to the other
adjustment.
2. Press the UP/DOWN buttons on the remote to increase or decrease
the setting. The display will revert to normal operation following
several seconds of inactivity.
Note: The tone adjustments are available for all surround modes
and inputs, except the MULTI input and analog bypass mode.

Cinema EQ

K
The EQ button (remote only) activates or deactivates a special CINEMA
EQ setting. This equalization may be desirable for playback of movie
source material to compensate for the acoustic differences between a
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