Expansion Connectors; Ground Lift Switch; Power Switch; Automatic Mixing Functions - Harman AKG DMM 4/2/4 Stereo Mode D'emploi

Description

Automatic mixing functions

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Expansion connectors

If four microphone channels are not sufficient, several DMM 4/2/4 can be connected together
(up to a maximum of 5). The expansion connectors TO MASTER and TO SLAVE can be used
for daisy-chaining. These are two 8-pin mini-DIN jacks labelled "EXPANSION".

Ground Lift switch

The Ground Lift switch connects or isolates the case with 0 V potential of the power supply.

Power switch

The power switch is used to turn on the unit.
The innovative automatic mixing functions of the DMM 4/2/4 assess whether a channel is
switched on and adjust the level of the output signal.
The automix algorithm is composed of the following functions, among others:
• NST (Noise Sensitive Threshold)
The threshold that must be exceeded in order to activate a microphone adapts
automatically to the ambient noise level. In other words, the louder the environment, the
loudler you will need to speak into a microphone in order to activate it. This prevents
microphones from activating when they are not required.
• Best Mic On
Comb filter effects may arise when two microphones are positioned close to each other. To
suppress these unnaturally muffled or hollow signals, only the microphone channel with the
highest level is switched on.
• Noise Detect
Continuous interfering signals such as noise from fans or air-conditioning units are
recognised and not used as activation criteria for microphone channels.
• LMON (Last Mic On)
The most recently switched on input signal is maintained until the next channel is activated.
• NOM Attenuation (Number of Open Microphones Attenuation)
On account of the risk of feedback from multiple open microphone channels, the master
output signal is attenuated by an adjustable factor for each activated channel.
DMM 4/2/4 Stereo
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