Configuring Global Settings
After the settings described above have been made for all input sources in your system, the following settings will remain in effect independent of the input selected.
Delay Settings
For the Dolby Digital or Dolby Pro Logic II modes, you may need to adjust the delay time setting. Note that the delay time is not adjustable for any other modes.
Important Note: Once the delay time is set with any input it will be effective with all other inputs too. Moreover, the surround delay time setting must be made only for either the Dolby Pro Logic II or the Dolby Digital mode. The other set- tings will be set automatically.
Due to the different distances between the listening position for the front chan- nel speakers and the surround speakers, the amount of time it takes for sound to reach your ears from the front or surround speakers is different. You may compen- sate for this difference through the use of the delay settings to adjust the timing for the specific speaker placement and acoustic conditions in your listening room or home theater.
The factory setting (see Surround Mode Chart page 28) is appropriate for most rooms, but some installations create an uncommon distance between the front and surround speakers that may cause the arrival of front channel sounds to become disconnected from surround channel sounds.
To resynchronize the front, center and surround channels, follow these steps:
1.Measure the distance from the listening/viewing position to the front speakers.
2.Measure the distance from the listening/viewing position to the surround speakers.
3.Subtract the distance to the surround speakers from the distance to the front speakers and multiply the result by 3, if you measured the distances in meters. If you measured the distances in feet, don’t multiply the result; it will be the same as the setting.
a. When setting the delay time for the Dolby Digital surround modes, the optimal delay time is the result of that subtraction. For example, if the front speakers are 3m away and the surround speakers are 1m away, the optimal delay time is figured as
(3 – 1) x 3 = 6. Thus, in this example, the delay time for Dolby Digital should be set at 6 milliseconds.
If you measured the distance in feet instead of meters, don’t multiply the difference by 3. Thus, if the front speakers are 10 feet away from the listening position, and the surround speakers are 4 feet away, then the difference will be 10 – 4 = 6, and the Dolby Digital delay should be set at
6milliseconds.
b.When setting the delay time for any Dolby Pro Logic II mode, take the result of the calculation above and add 15 to obtain the optimal delay time. For example, if the front speakers are 3m away and the surround speakers are 1m away, the optimal delay time is figured as (3 – 1) x 3 + 15 = 21. Thus, in this example, the Pro Logic II delay should be set at 21 milliseconds.
Similarly for English measurements, if the front speakers are 10 feet away and the surround speakers are 4 feet away from the listening positon, then the delay for the Dolby Pro Logic II modes is calculated at 10 – 4 = 6 + 15 = 21 milliseconds.
NOTE: The DTS, 5CH Stereo, Hall and Theater modes use a fixed, nonadjustable delay time.
The Dolby Digital Mode also includes a separate setting for the center channel delay mode, since the discrete nature of these signals makes the location of the center channel speaker more critical. To calculate the delay for the center chan- nel, measure the distance from the pre- ferred listening position in the center of the room to both the center channel speaker and either the left or right speaker.
If the distances are equal, no further adjustment is required and the center delay should be left zero. If the distance to the front speakers is greater than the distance to the center speaker, you may wish to reposition the speakers by moving the front left and front right speakers closer to the listening position or the center speaker further away from the listening position.
If repositioning of the speakers is not possible, adjust the center delay time, adding 1 millisecond of center channel delay for every 30cm (foot) closer to the listening position the center speaker is than the front speakers. For example, if the front left and front right speakers are each 3m (12 feet) from the listening posi- tion and the center channel speaker is 2.4m (10 feet) away, the delay is figured as 300cm (12 feet) – 240cm (10 feet) = 60cm (2 feet), suggesting an optimal center delay of 2 milliseconds.
To set the delay time, follow these steps:
1.To make the delay settings for the Dolby Digital mode (this will include the Center delay setting, and the sur- round delay for the Pro Logic II mode will be set automatically), press the Input Source Selector !5 and select any input that is associated with a digital input and the Dolby Digital surround mode.
2. Press the Delay Button | &. |
SDELAY will appear in the Main
Information Display K.
3.Press the Set Button E^.
4.Press the ⁄/¤ Buttons C on the remote or the Selector Buttons % on the front panel until the desired rear delay time for the Dolby Digital mode, calculated using the formula for Dolby Digital above (item a), appears in the display.
5.Press the Set Button E^ to enter the setting into the AVR480’s memory.
6.Press the ⁄/¤ Buttons C on the remote once, so that CDELAY appears in the Main Information Display K.
7.Press the Set Button E^.
8.Press the ⁄/¤ Buttons C% until the desired delay time for the center channel appears in the display.
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