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0dB and to match the other channels to it.
Normally, if the Right speaker is located at the
same distance from the listening position to the
Left speaker it should be set at the same level as
the Left speaker.
Press the Test button again to leave or cancel the
Test mode; any changes will be memorized
automatically.
NOTE:
There is no output in the Subwoofer during noise
sequencer operation; therefore it is difficult to adjust
the level in test mode. The Subwoofer level can be
adjusted in the OSD setup menu with musical input.
After setting the balance with the Test function, you
may wish to make further adjustments by ear,
depending on the material you are listening to.
There are two ways to access the Channel Balance
screen, which allows you to adjust levels while
monitoring a source.
Highlight CHANNEL BALANCE in the SETUP menu
and press Select on the remote. You will see a
screen similar to the following:
The GTP-830 allows the volume of each speaker to
be individually trimmed so that none of the speak-
ers dominates in playback and detracts from the
surround illusion.
Highlight the speaker you wish to adjust, using the
Up and Down arrow buttons. Use the Left arrow
button to lower the output level, and the Right
arrow button to raise the output level. Each speaker
can be adjusted within a -10 to +10dB range, in
steps of 1dB. The back channels can be adjusted
within a -60 to +10 dB range, in steps of 2dB.
Highlight SAVE & EXIT and press Select to save the
settings and return to the SETUP menu.
The Channel Balance menu can also be accessed
directly with the bal button [38] on the remote control.
3.3 Channel Delays
For the best surround sound performance it is
important that sound from all speakers reach the
listener’s ears at the same time. Because the sur-
round/rear speakers are usually closer to the listen-
er than the front speakers, there is a tendency for
the ear to localize sounds to the rear, because the
ear takes most notice of the sounds that arrive at
the head first. Similarly, the center speaker is often
closer to the listener than the front left and right
speakers. To compensate for this, the GTP-830 can
slightly delay the audio sent to the center and rear
(closer) speakers. In this way, when playing Dolby
Digital or Dolby Pro Logic soundtracks, the sound
from all speakers arrives uniformly at the listening
position as intended by the film’s producer.
Each millisecond corresponds approximately with
1 foot or 30.5 centimeters.
To set the center channel delay time:
Call up the SETUP menu of the On Screen Display.
Select the Channel Delays menu:
Choose CENTER and select the desired delay time
(1, 2, 3, 4 or 5ms).
To set the surround channel delay time:
Use the Up or Down arrow buttons [34] to highlight
the Surrrounds.
INITIAL SETUP
CHANNEL BALANCE
LEFT : 0dB
CENTER: 0dB
RIGHT : 0dB
REAR R : 0dB
BACK R : 0dB
BACK L : 0dB
REAR L : 0dB
SUB : 0dB
DO NOT SAVE AND EXIT
SAVE AND EXIT
CHANNEL DELAYS
CENTER: N/A
SURROUNDS : N/A
DO NOT SAVE AND EXIT
SAVE AND EXIT
ADCOM OWNER’S MANUAL | 31