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Level and freq are changed by sliding up/down - left/right and the Q factor by scrolling the mouse wheel when
pointing a band identifier.
Other features: Band button for selection of the operating band, Phase button for phase curve reading and clear
button for a default setting of the complete EQ section.
The parameters on the EQ section can be saved/loaded to the computer and can be copy/paste to another
input channel´s sections.
ON/OFF is the EQ by-pass and turns the section whitened when OFF for a cleaner canvas job.
LIMITER Section. The dynamic section of the MAP includes a LIMITER on each output set in POST-FADER mode
allowing a precise last control of the MAP outputs audio levels to protect loudspeakers or another post
processing.
THRESHOLD. Is the level reference for the dynamic action.
ATTACK and RELEASE Parameters time.
The threshold can be adjusted graphically from the transfer curve. The point defines the threshold. Just
drag up/down to the new value.
An additional bargraph indicates the Gain Reduction experimented on the output signal -red bar-
DELAY Section. This component introduces a delay of the input signal useful for diverse applications. Range is
from 0 (no delay, default) to 300 ms maximum. The delay can be entered as time or as travelled distance in
meters or feet at a defined Temperature. When the delay is entered as distance, the user must define the actual
air temperature and the processor would adjust the required time delay automatically.
OUTPUT FADER Section. Includes the fader, Mute, solo and phase buttons.
FADER with long range bargraph. Fader movements:
-Double click on it to set to 0 dB.
-Select it (changes fader color from yellow to blue) and turn your mouse wheel for setting it numerically
in 0.5 dB/step.
-Set the fader gain numerically on the box.
ON-OFF switch. This is the main channel switch (also known as mute switch)
PHASE. Changes the relative phase of the output signal.
SOLO. This switch
makes a solo
of the channel by switching off (muting) all the other channels. This feature is
used to isolate the channel in order to verify the system in a test procedure and for that reason it is not used
normally when the system is operating. When using the processor as a microphone mixer, this button can be
helpful to make a brief channel solo, for example for the presenter messages, so reducing the need to attenuate
other microphones so loosing the relative fader positions.
NOTE. Use this button carefully.
7.2.5 VOICE MESSAGES Panel
The MAP processor can store internally up to 5 voice messages to be played anytime.
The messages has a maximum length of 16 seconds each and are mainly used for alarm and
evacuation systems, warning messages or any other short message including corporate music or welcome
messages.
The system only accepts message files with the following specification: file type pcm, extension .wav,
sampling rate 22.050 samples per second, mono. You can use your favourite sound converter to make the file
ready for upload to the MAP. Files longer than 16 seconds would be cut.
For a continuous loop, check the
repeat
box in the configuration menu.
OUTPUT. Comes from input
channel 12
. This channel #12 mixes the voices messages (gain always at unity gain)
with the ch-12 preamp output. See the block diagram for details.
MATRIX AUDIO PROCESSOR MAP128 /MAP1216