STUDER 21. Sep. 2004 Release Notes Vista 3.4
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Application example of Matrix Busses: Panning in a PA environment
Even though matrix busses can be used for a number of applications, a most typical situation should
be described here. A live venue does have a number of speakers and wants to use the console
panner to move position sound sources within the given installation. Of course the panner of the
console is assuming the speakers to be sitting on a certain angles to the listener. E.g. for the well
known 5.1 format: left, right, center, left surround, right surround, LFE. Lets assume the 10
loudspeaker channels of the venue mentioned above. Obviously there is a need to map the
standardized surround channels onto the 10 speakers, depending on their placement within the
venue. This is done by configuring 10 matrix busses which are possible to be fed by the 6 master
channels. Depending on a speakers position, the operator adds signal from one or several master
channels to a speaker channel in order to match the impression in the venue with the panner
directions. It is also possible to add some DSP processing in the matrix output channels, e.g. some
delay or EQ.
The Channel/Bus view of the Configuration Editor Software could look like this:
Matrix channels with their matrix busses
In this very simple example the matrix busses are only fed by the master busses. (Such “short”
matrix busses will not need the same amount of DSP power as other busses in the system!) The 6
master busses are used as surround masters and the multiformat pan on the input channels are set
to 5.1.
When working in 2 channel stereo or LCR (3 channel) mode, the same principles apply. In this case 2
master channels (or 3 respectively) would be configured. The operator mixes the loudspeaker signal
out of the available masters. If the speakers are removable and their position changes between
different productions, there is no problem to adjust the “translation” between standard pan
formats and the installation by adjusting the matrix level on the master channels. The number of
matrix outputs would always match the installation in the venue.
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