- Crestron Electronics Digital Audio Processor With Room Control Operations Guide C2N-DAP8RC
Digital Audio Processor with Room Control  Crestron C2N-DAP8RC  
68 • Digital Audio Processor with Room Control: C2N-DAP8RC   Operations Guide - DOC. 8187A 
Surround Sound Decoder Analog Input and Output Signals (continued) 
SIGNAL TYPE
(I/O) 
FUNCTION 
Volume 
Volume_FB 
I 
O 
Sets the master volume for all digital output channels. 
The volume is adjustable within a range of –80 dB to 
+12 dB. Thus valid values range from -800 (-80 dB) 
to +120 (+12 dB). 
Decoder_Src 
Decoder_Src_FB 
I 
O 
Controls and reports the source currently used by the 
decoder. 
 Source
 Decoder Source 
  Noise Generator (Special Case)  0 
 SPDIF A  1 
 SPDIF B  2 
 Optical E  3 
 Optical F  4 
  CAT5 Video In 1-2-3-4  5 
  CAT5 Audio In  6 
  Audio In #2  7 
  Audio In #3  8 
  Audio In #4  9 
  Audio In #5  10 
  Audio In #6  11 
Enabling any of the Noise generators sets 
Decoder_Src to zero, thus the previous source needs 
to be manually re-selected after noise generation is 
complete. 
Selecting any of the analog audio inputs (CAT5 
through Audio In #6) will also affect the DAP8 Stereo 
Audio Switch setting on slot 06. 
High_Dyn_Range, 
Low_Dyn_Range 
High_Dyn_Range_Fb, 
Low_Dyn_Range_FB 
I 
O 
Controls dynamic range compression in Dolby Digital 
sources. The control range is 0 to 100% (for 
minimum to maximum compression). 
For most applications, these signals need not be 
used, since the DYN_Range inputs described before 
offer adequate control of compression ratios. 
Sub_Limit 
Sub_Limit_FB 
I 
O 
Sets the peak limit, or maximum output level of the 
subwoofer. The peak level is adjustable within a 
range of –25 dB to 0 dB. Values more negative than 
-24.0 dB disable peak limiting (the default setting). 
LFE_Trim 
LFE_Trim_FB 
I 
O 
Sets the amount of gain to the LFE, or Low 
Frequency Effects channel during bass management. 
The LFE trim is adjustable within a range of –15 dB 
to 0 dB. 
Trim_L through 
Trim_Sub 
Trim_L_FB through 
Trim_Sub_FB 
I 
O 
Sets the gain of the indicated channel. The trim is 
adjustable within a range of –30 dB to +30 dB, 
although Dolby recommends a range of –12 dB to 
+12 dB. The Master Volume and the trim volume 
(and possibly other compensation terms) are added 
together to produce the output volume. 
Delay_Left through 
Delay_Sub 
Delay_Left_FB through 
Delay_Sub_FB 
I 
O 
Sets the delay, in milliseconds, for the indicated 
channel. The delay is adjustable within a range of 0 
ms to 20 ms, although the Dolby recommendations 
are 0 ms to 5 ms for the center channel and 0 ms to 
15 ms for all other channels. 
Certain Pro Logic decoding modes add a 10 ms 
delay that is not displayed or accounted for here. 
Global_Bass, 
Global_Treble 
Global_Bass_FB, 
Global_Treble_FB 
I 
O 
Sets the bass and treble settings for all digital output 
channels. The bass and treble are adjustable within a 
range of -18.0 dB to +18.0 dB. 
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