Audio Power DSP System Multiface Manual De Usuario

 

 
46                            

User's Guide HDSP System Multiface II

 © RME

 

 

24. Disconnect Mode 

 
RME's exclusive Disconnect mode lets you adjust level, input selection and signal mix via your 
computer, and simply detach the Multiface afterwards. With this, a stand-alone operation of the 
Multiface gets possible. When the Multiface has been configured using Settings dialog and To-
talMix, it won't loose those settings after detaching it from the computer. Provided, the Multiface 
is operated with an external power supply, because the Multiface (as all HDSP I/O-boxes) does 
not contain memory, so all settings get lost upon power-off.  
 
If you do not need to record or playback audio with your computer, the Multiface can be used in 
a fixed configuration, for example as: 
 
•  8-channel analog/ADAT/analog converter with monitoring 
•  SPDIF AD- or DA-converter 
•  Mixer / Patchbay / Distributor analog and digital 
• Headphone 

mixer 

•  Line splitter with balanced output 
•  what ever you just need! 
 
The unit can also stay connected to a desktop computer, receiving its power from there. The 
Disconnect mode will then cause the unit to be isolated from the computer, no longer be avail-
able to any software or other changes – an interesting security application. 
 
 

 

 
The Multiface has eight balanced Line inputs as 1/4" TRS jacks on the back of the unit. The 
electronic input stage is built in a servo balanced design which handles unbalanced (mono 
jacks) and balanced (stereo jacks) correctly, automatically adjusting the level reference. 
 

When using unbalanced cables with TRS jacks: be sure to connect the 'ring' contact of the 
TRS jack with ground. Otherwise noise may occur, caused by the unconnected negative 
input of the balanced input. 

 
One of the main issues when working with an AD-converter is to maintain the full dynamic 
range within the best operating level. Therefore the Multiface II internally uses hi-quality elec-
tronic switches, which allow for a perfect adaptation of all eight inputs to the three most often 
used studio levels. The configuration is done with the front panel switch ANALOG LEVEL 
INPUTS. 
 
The 'standardized' studio levels do not result in a (often desired) full scale level, but take some 
additional digital headroom into consideration. The amount of headroom is different in different 
standards, and again differently implemented by different manufacturers. Because of this we 
decided to define the levels of the Multiface in the most compatible way. 
 

Lo Gain 

+19 dBu 

15 dB 

+4 dBu 

+13 dBu 

9 dB 

-10 dBV 

+2 dBV 

12 dB 

 
With +4 dBu selected, the according headroom meets the latest EBU recommendations for 
Broadcast usage. At -10 dBV a headroom of 12 dB is common practice, each mixing desk op-
erating at -10 dBV is able to send and receive much higher levels. Lo Gain is best suited for 
professional users who prefer to work balanced and at highest levels. Lo Gain provides 15 dB 
headroom at +4 dBu nominal level.