Adcom GTP-860 Owner's Manual page 27

results, start with the Left channel set at 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
INPUT SETTINGS
setup menu with musical input.
AUDIO = VIDEO 3
VIDEO = VIDEO 3
INPUT SETTINGS
After setting the balance with the Test function, you may
MODE = 5 CH STEREO
wish to make further adjustments by ear, depending on
DYNAMIC RANGE = N/A AUDIO = VIDEO 3
the material you are listening to. There are two ways to
VIDEO = VIDEO 3
CENTER WIDTH=N/A
access the Channel Balance screen, which allows you to
MODE = 5 CH STEREO
DIMENSION=N/A
adjust levels while monitoring a source.
DYNAMIC RANGE = N/A
DO NOT SAVE AND EXIT
SAVE AND EXIT
CENTER WIDTH=N/A
Highlight CHANNEL BALANCE in the SETUP menu and press
DIMENSION=N/A
Select on the remote. You will see a screen similar to the
DO NOT SAVE AND EXIT
SAVE AND EXIT
following:
CHANNEL BALANCE
LEFT : 0dB
CENTER : - 3dB
RIGHT CHANNEL BALANCE : 0dB
REAR R : LEFT : 0dB
BACK R : CENTER : - 3dB 0dB
BACK L : RIGHT : 0dB
REAR L : REAR R : 0dB
SUB BACK R : : 0dB
BACK L :
DO NOT SAVE AND EXIT REAR L :
SAVE AND EXIT SUB :
DO NOT SAVE AND EXIT
The GTP-860 allows the volume of each speaker to be
SAVE AND EXIT
individually trimmed so that none of the speakers domi-
SPEAKER SETTINGS
nates in playback and detracts from the surround illusion.
PRESET : 1
Highlight the speaker you wish to adjust, using the Up and
MAIN : LARGE
SPEAKER SETTINGS
Down arrow buttons. Use the Left arrow button to lower
CENTER : OFF
the output level, and the Right arrow button to raise the
SURROUND : LARGE PRESET : 1
output level. Each speaker can be adjusted within a -10 SUBWOOFER : ON MAIN : LARGE
CENTER : OFF
to +10dB range, in steps of 1dB. The back channels can be
SURROUND : LARGE
adjusted within a -60 to +10 dB range, in steps of 2dB.
DO NOT SAVE AND EXIT SUBWOOFER : ON
SAVE AND EXIT
0dB
0dB
0dB
0dB
0dB
0dB
0dB
Highlight SAVE & EXIT and press Select to save the set-
tings and return to the SETUP menu.
The Channel Balance menu can also be accessed directly
with the bal button [39] 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 surround/rear speakers
are usually closer to the listener than the front speak-
ers, 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
SETUP
speaker is often closer to the listener than the front left
and right speakers. To compensate for this, the GTP-860
can slightly delay the audio sent to the center and rear
SETUP
1 INPUT SETTINGS
(closer) speakers. In this way, when playing Dolby Digital
2 CHANNEL BALANCE
or Dolby Pro Logic soundtracks, the sound from all speak-
3 CHANNEL DELAYS
ers arrives uniformly at the listening position as intended
4 SPEAKER SETTINGS
1 INPUT SETTINGS
by the film's producer.
5 EXIT
2 CHANNEL BALANCE
3 CHANNEL DELAYS
Each millisecond corresponds approximately with
4 SPEAKER SETTINGS
1 foot or 30.5 centimeters.
5 EXIT
To set the center channel delay time:
CHANNEL DELAYS
Call up the SETUP menu of the On Screen Display.
Select the Channel Delays menu:
CENTER : 1ms
SURROUNDS CHANNEL DELAYS : 5ms
CENTER :
SURROUNDS
DO NOT SAVE AND EXIT
SAVE AND EXIT
DO NOT SAVE AND EXIT
SAVE AND EXIT
INPUT SETTINGS
Choose CENTER and select the desired delay time
(1, 2, 3, 4 or 5ms).
AUDIO = VIDEO 3
VIDEO = VIDEO 3
INPUT SETTINGS
To set the surround channel delay time:
MODE = STEREO
DYNAMIC RANGE = N/A
AUDIO = VIDEO 3
Use the Up or Down arrow buttons [39] to highlight the
VIDEO = VIDEO 3
Surrrounds. CENTER WIDTH=N/A
MODE = STEREO
DIMENSION=N/A
DYNAMIC RANGE = N/A
DO NOT SAVE AND EXIT
SAVE AND EXIT CENTER WIDTH=N/A
DIMENSION=N/A
1ms
: 5ms
ADCOM GTP-860 OWNER'S MANUAL | 27