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drastically to nothing. Y the other hand, you would adjust ads priority #2 to a priority
depth of 10 dB meaning the ducked signals in this case the background would be
attenuated only 10 dB and both and ads can be heard naturally.
PRIORITY Selects the number given to each separate signal. Higher number results in higher
priority or mandatory over the lower ones. You can select same priority to different
signals owning that are in the same category, example music from CD or from VoIP
music.
DUCKED ENABLE Selects the action of the ducker, On active, OFF disabled.
Microphone Anti Feedback. AF
This audio component helps in reducing the feedback (or larsen) effect due to an excessive acoustic
gain in a reinforcement installation. Some elements as additive wall reflections, high gain in some frequencies
on the microphone/loudspeaker combination tends to make the system unstable and very prone to feedback.
Things become worst when the sound system is not attended in real time by an audio engineer. Among other
tools as frequency spectrum tailoring or signal compression, the MAP processor incorporates a new effect to
combat the feedback based on frequency shifting by constant amount.
The effect makes a very small change of the full frequency spectrum that is not perceptible when normal
speech listening at a benefit of about 4 to 6 dB higher acoustic gain possible before feedback.
The effect is not useful for music due to the nature of the spectral modification.
This component is very useful for unattended churches or speech centres.
You can set the following parameters:
AF. This button on the INPUT DETAIL panel, near to fader starts/stops the effect on desired input channels.
SHIFT The amount of positive frequency constant shift. Try with 2 to 5 Hz with optimization between extra
gain of the system and timbre alteration.
INVERSE. Makes negative frequency shift, try it on large reverb spaces.
DOWN. Reserved for future use.
Oscillator
This local oscillator combined with the multiple accurate level bar graphs can help you as general tool for
Inspection, level setting, set of dynamics etc.
Parameters selection:
SINE. Sinusoidal waveform. Freq. selectable from 20 to 20KHz. Level -75 to +15 dBu
WHITE NOISE / PINK NOISE. Random noise waveform generators. Used for spectral analysis.
Output Automix
This audio component allows for an easy mixing process relaxing the operator continuous gain
adjustments of the microphones. Useful scenarios are company board rooms, county councils, courts and
places of worship where normally exist difficult solution.
Defining a precise gain set increases intelligibility and system stability against feedback. This job is easily
done inside the MAP.
The method used inside the processor is called
shared gain
. It means the installer defines a total gain
given to all the microphones in the system and the MAP shares the available gain between them, giving more
gain to the microphones that shows more activity (more signal) and less gain to the lower. In other words, the
mic that is inactive has reduced its gain to give it to the active
The total gain available is a constant dependant of the microphone polar pattern, loudspeaker frequency
response, distance etc. and must be adjusted with certain margins.
The following parameters can be set:
ATTACK defines the time taken to begin the auto mixing, avoiding false trigering.
RELEASE defines the time the auto mix is still actuating after signals drops in level.
RATIO Controls de auto-mix level ranging from 1:1, no effect to ratio 2:1 where two equal amplitude
signals are reduced 6 dB each to ratio 3:1 where two equal signals are reduced 12 dB.
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