Delay Setup; Contour Setup - Rotel RSP-1068 Manuel D'utilisation

Calibration with an SPL meter:
Calibrating the system with an SPL meter, rather
than by ear, provides more precise results and
improves the system's performance significantly.
Inexpensive SPL meters are widely available
and the procedure is quick and easy.
Both Dolby and DTS specify a standard
calibration level for all theaters to ensure that
soundtracks can be played at the volume
level intended by the director of the film. This
reference level should result in spoken dialog
played at a realistic level for normal speech
with the loudest peaks in any single channel
at about 105dB. The RSP-1068's test tones are
generated at a precise level (-30dBFs) relative
to the loudest possible digitally recorded sound.
At the Dolby or DTS reference level, these test
tones should produce a 75dB reading on an
SPL meter.
Set the meter to its 70dB dial setting with SLOW
response and C-weighting, held away from
your body at your listening position (mounting
the SPL meter on a camera tripod makes this
easier). You can point the SPL meter at each
speaker as it is being measured; however, po-
sitioning the meter in a fixed position pointing
at the ceiling is easier and probably produces
more consistent results.
Increase the master volume control on the
RSP-1068 until the meter reads 75dB (+5dB
on the meter scale) when playing the test tone
through one of the front speakers. Then, use
the individual channel adjustments on the TEST
TONE menu to adjust each of the individual
speakers, including the subwoofer, to the same
75dB on the SPL meter.
NOTE: Due to meter weighting curves
and room effects, the actual level of the
subwoofer may be slightly higher than you
measure. To compensate, Dolby suggests
setting the subwoofer several dB lower
when calibrating with an SPL meter (i.e. set
the subwoofer to read 72dB on the meter
instead of 75dB). Ultimately, the proper
subwoofer level must be determined by
personal taste and some listeners prefer
to set it above 75dB for film soundtracks.
Exaggerated bass effects come at the
expense of proper blending with the main
speakers and place stress on the subwoof-
er and its amplifier. If you can localize
bass from the subwoofer, the subwoofer
level may be too high. Music can be use-
37
ful for fine-tuning the subwoofer level as
excessive bass is readily apparent. The
proper setting will generally work well for
music and movie soundtracks.
Remember the setting of the master volume
control used during this calibration. To play a
Dolby Digital or DTS soundtrack at the refer-
ence volume level, simply return to that volume
setting. Note that most home theater listeners
find this setting to be excessively loud. Let your
own ears be the judge for deciding how loud
to playback movie soundtracks and adjust the
master volume control accordingly. Regardless
of your listening levels, using an SPL meter to
calibrate equal levels for all speakers in the
system is strongly recommended.

Delay Setup

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The DELAY SETUP menu, which is reached
from the MAIN menu, allows you to set the
delay for individual speakers. This ensures
that the sound from each speaker arrives
simultaneously at the listening position, even
when the speakers are not all placed at equal
distances from the listener. Increase the delay
to speakers located closer to the seating area
and decrease the delay to speakers located
farther from the seating area.
The RSP-1068 makes setting the delay time for
each speaker very easy. Simply measure the
distance (in feet or meters) from your seating
position to each speaker in your system. Set
the measured distance in the line for each
speaker. The menu provides a line for each
speaker configured in your system and provides
a range of settings up to 99 feet (30 meters) in
1 foot (0.3 m) increments with each increment
equivalent to an additional delay of 1ms.
To change a setting, place the highlight on the
desired line using the UP/DOWN buttons and
use the +/– buttons to increase or decrease
the delay setting. To return to the MAIN menu,
press the ENTER button. Press the MENU/OSD
button on the remote to cancel the display and
return to normal operation.

Contour Setup

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The CONTOUR SETUP menu allows digital
adjustment of the bass and treble response
of each group of speakers in the system. For
example, if your center channel speaker sounds
too bright, you could roll off the extreme high
frequencies.
SPEAKER (front/center/surround/cen-
ter back/all): Select which speaker or group
of speakers to adjust. Selecting ALL permits
adjustment of the entire system as a whole.
DEFEAT (on/off): Selecting the ON setting
defeats the contour adjustment, bypassing the
contour processing entirely for that speaker or
group of speakers.
HF CONTOUR: Adjusts the extreme high
frequency slope over a range of -6dB (MIN)
to +6dB (MAX). Negative number settings
reduce the high frequency output; positive
number settings increase it.
LF CONTOUR: Adjusts the extreme low
frequency slope over a range of -6dB (MIN) to
+6dB (MAX). Negative number settings reduce
the low frequency output; positive number
settings increase it.
The contour adjustments are designed to work
at the frequency extremes and be relatively
subtle so that they do not have a negative
impact on midrange sounds. We recommend
acclimating to the sound of the system with the
contour adjustments defeated and then making
adjustments, if necessary, to address specific
speaker response issues or personal taste.
NOTE: You can also make temporary
contour adjustments using the TONE and
UP/DOWN buttons on the remote. See
the Contour/Tone Settings section of this
manual for details.
English