Theta Digital Casablanca III HD, Руководство пользователя

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Speaker Delays
Like the Levels submenu(s), the Delays submenu(s) are interactive. Only installed DAC channels will appear in the
Delays submenu. If there are two Delays submenus, the
A-D button will toggle between them.
The Delays submenu allows the user to set a time delay for each speaker to reflect the audio system configuration,
room characteristics, or the listener’s preference. The sound from all speakers should reach the listening position at
the same time, and this submenu provides a means for achieving just that. The allowable range for the front left/right,
center and sub speaker(s) is
0 to 10 milliseconds (mS) and 15 to 31 mS for the side and surround speakers. Since
discrete sources are often recorded with surround delays, it is recommended that the surround delay setting for 5.1
sources be 15 mS less than non 5.1 sources.
Figure 33 - Front Panel Display of the SETUP / INP / DELAYS 1 Submenu
Press SETUP , input ( INP ) then delays ( DLYS ) to access the speaker delays setup submenu shown in figure 33. The
current delay settings will be displayed on the top row of the VFD. The submenu title “ DELAYS ” will be displayed in
the upper right corner. Delay settings apply to all MODES , however, they can be further manipulated when the MODE
is Dolby Digital or DTS, via additional Setup submenus for these MODES . These additional Setup features and
respective submenus are discussed further in this section.
The first time a multi-channel audio system is set up in a room, calibration of time delay [and speaker levels] is
required in order to have the sound from each individual speaker reach the listener at the correct time.
If more than six DAC channels are installed in the Casablanca III HD, there will be a right arrow above the
A-D button.
Press this button, and the second Delay page will be presented as shown in figure 34.
Figure 34 - Front Panel Display of the SETUP / INP / DELAYS 2 Submenu
Speaker delay is required if a speaker is closer to the listening position than the front left and right speakers. When
this is the case, the delay time should be 1mS for each foot difference.
Begin by measuring the distance (in feet) from each speaker to the listening position. Write down all of these values.
Ideally, the front left/right and center speakers will all be the same distance to the listening position. In this case, set
the front left/right and center speaker delays to 0mS. If the center speaker is closer, delay it 1mS for each foot of
difference between the center and front left/right, to the listening position. If the front left/right speakers are closer than
the center, then set the center delay at 0 and delay the front left/right speakers, again, 1mS for each foot of difference
from the listening position.