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BARGRAPH Indicates de level in dBu from -40 to +20 dBu in 2 dB steps. The bar changes from green to red color
and intermediates depending on the level. Level indication includes a peak reading dot.
DELAY Section. This component introduces a delay of the input signal useful for diverse applications. Range is
from 0 (no delay, default) to 990 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.
SIX BANDS EQ. The equaliser is composed of six bands. Each band can be tailored as:
Peq. Parametric filter with selectable Gain (dB), Freq (Hz) and Q factor (bandwidth)
Low Sh/High Sh. Shelving type filters for low frequencies or for High frequencies
Notch. The notch filter cuts out a very narrow band in the selected freq. Effect to the band is minimum.
The equalisation graph can be edited numerically or with the mouse by clicking and dragging over the band
identifier.
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.
GATE Section. A gate is a type of expander with an abrupt level change. Signals entering the gate detector that
are lower than the threshold setting would
shut
the gate so the signal becomes cut (or attenuated). When the
signal is over the threshold the gate
open
s so the signal passes unmodified.
The noise gate section includes a side chain filter with selectable bandwidth and key source selection. Audio
signal is not altered nor processed by the side chain. See the block diagram.
SIDE CHAIN. The detector on the gate takes the signal from its own channel (default key source=same channel
number) or from another channel. Thanks to this feature it is possible to shut/open many channel's gates from
the same channel in the same group or different so making special effects or conditioned processing. One
example can be when processing stereo signals by selecting the same key source, the left channel, the L and R
channels would shut synchronized.
The filter on the side chain would help in limiting the action of the gate to signals with a special frequency
pattern . It means that a low frequency present on the signal would not opens a voice presenter gate that has
been side chain filtered as voice pattern (300 to 3KHz).
LF (Hz) defines the low frequency point (minimum freq. entering the detector gate).
HF (Hz) defines the high frequency point( maximum freq.)
K.SOURCE. Key Source. Defines the channel selected for the detector input. See block diagram.
SHUT/OPEN gate activity indicators.
THRES Gate threshold. Is the level reference for the gate action.
RANGE. Is defined as the residual level of the signal when the gate is shut. The signal is weakened when shut to
this amount so the change is less obtrusive.
ON/OFF is the gate by-pass and turns the section whitened when OFF for a cleaner canvas job.
The range and threshold can be adjusted graphically from the transfer curve. Upper point defines de
threshold and the lower point the range. Both points drags up/down to the new values.
COMPRESSOR Section. The dynamic section of the MAP includes a compressor/expander on each input channel.
Definition of compressor or expander is done by the ratio settings:
COMPRESSOR Ratios from 1:1 to oo:1
EXPANDER Ratios from 1:1,2 to 1:7
FREQUENCY DEPENDANT COMPRESSOR/EXPANDER. This parametric EQ makes a spectrum correction to make
the compressor or expander more sensitive to some frequencies. This makes a de-esser effect easy correcting
for speech excess of sss and so other effects.
K.SOURCE. Key Source. Defines the channel selected for the detector input. See block diagram.
MATRIX AUDIO PROCESSOR MAP128 /MAP1216