OPPO Digital BDP-80 ユーザーズマニュアル

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Distance between the surround speakers and the listener must be shorter than or equal to that 
between the front speakers and the listener. 
 
In case the channel delay settings cannot match your speaker configuration, please set all 
distances to the same and use your receiver/amplifier to set the channel delay. 
 
NOTE 
The front, surround and surround back speakers are configured as pairs.  Changes to the 
distance of one speaker will automatically change the other speaker of the pair.  
 
3.  Trim Level: The speaker trim level parameters sets the volume of each individual channel.  
Channel trim is generally not required since most A/V receivers have the capability to adjust 
channel trim and compensate for speaker sensitivity differences.  However, if your receiver does not 
have such functions (many receivers do not support channel trim for their multi-channel analog 
inputs), you may adjust channel trim through the player.  For most accurate results, it is 
recommended that you use test tones from a calibration disc, such as AIX Records Audio 
Calibration Disc and HD Music Sampler
 or Digital Video Essentials HD Basics, and a SPL (Sound 
Pressure Level) meter.  The trim level can be set to +/- 10dB in 0.5dB increments. 
 
Other Audio Processing Settings 
In addition to Speaker Configuration, Dynamic Range Control is another audio processing setting 
that can be configured: 
 
1.  Dynamic Range Control: To set the Dynamic Range Compression (DRC).  DRC can smooth out 
the sonic peaks and valleys common with wide-range digital audio.  Enabling DRC may make low 
level audio more audible during low-level listening.  Turning off DRC restores the sonic energy 
present in the original recording.  The available options are: 
 
•  Auto – Play at the dynamic range specified by the disc.  This option applies to Blu-ray 
Discs only.  For other disc types no dynamic range compression is applied. 
•  On – Turn on dynamic range compression. 
•  Off – Turn off dynamic range compression.