Connectivity - Genelec SE Operating Manual

modes of operation (GLM.SE™ controller, stand-alone using stored settings, and stand-alone using manual
controls) are independent of each other – one set of controls does not sum with another.
Where does the volume control happen?
Genelec DSP loudspeakers and subwoofers implement volume control as a part of digital signal processing.
Volume control decreases the digital values in the digital audio data just before the data is written into the
DA converter or AES outputs. Decreasing the value makes the sound level lower. The command to set the
volume to a certain level is created in the computer GLM user interface software and mediated using the
loudspeaker control network. No audio data travels on the control network.
What is the quality of digital audio when attenuated using Genelec volume control?
It is well known that attenuation of the digital audio signal in a DSP processor decreases the number
of significant bits representing the data. This is called quantization. Coarse quantization (very few bits
representing the data) can lead to distortion if the data is not processed properly.
There is a standard technology that eliminates this quantization distortion in digital signal processing. This
technology is called dithering. Genelec uses proper dithering at the volume control operation to ensure that
the signal after the volume control is a perfectly linear digital audio signal, and no distortion is generated.
There is no increase in the audible or measurable distortion level in Genelec DSP loudspeakers and
subwoofers when the volume is reduced, and the signal maintains its original linearity and smoothness.
The only audible consequence of lowering the volume setting is that the sound level decreases.

Connectivity

Do I have to have all cables sent with the system connected at all times?
No. The only cables that MUST be connected are the AES/EBU signal cables and mains power cables.
The DSP system can be used in Stand-alone Mode and may be setup in two-ways:
• The system is setup using the controls on the 8130A back panel and SE7261A connector panel.
The GLM.SE™ Control Network is not required in this case (Stand-alone – Manual Controls
mode).
• The system is setup using the GLM.SE™ and, using the GLM.SE™ Control Network, the
parameters uploaded to the loudspeakers" internal memory. Once this is done the network may
be disconnected (Stand-alone – Stored Controls mode).
In both cases, GLM.SE™ control of mutes, groups and other functions is not possible and volume control
must be done at the source.
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