Vortex Media VTX 1000 Benutzerhandbuch

Matrix Mixer 

  

The matrix mixer will need to be changed from the default settings in order to send Inputs 1-4 as well as 
Output W, X, Y, and Z bus channel.  Note that since Inputs 1-4 are microphones, the cross-points are 
colored blue to indicate that they are gated to Outputs W, X, Y, and Z.  The default routing to Output B and 
T will satisfy our design goals. 

  

The outputs P, W, X, Y, and Z are signals that will be sent over the EFBus to the Vortex EF2280.  See the 
section entitled Conference Composer Layout Vortex EF2280 to find out how to take those signals from the 
bus and send them to the loudspeakers and video codec. 

  

Input B and Output B are set to +10 dB and -10 dB respectively.  Please refer to the section entitled “Gain 
Structure” under the W

IRING THE 

S

OUND

S

TATION 

VTX 1000 

TO A 

V

ORTEX DEVICE

 heading for more information as 

to the reasoning behind the gain levels. 

  

We will set Output D to -30 dB in order to protect the subwoofer from "bottoming out" on high-amplitude 
transient sounds.    

 

The output R1 is our Acoustic Echo Canceller (AEC) reference signal.  This signal is what the internal AEC 
uses to remove from the local microphones.  In our example, we will remove the codec, telephone, 
SoundStation VTX 1000, and program audio from the local microphones.  Note that local microphones are 
not included in the Reference Signal even though we are reinforcing them.   

 

51