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Compression
The task of the compressor is to reduce the dynamic range of the input signal
and to control the overall level. The MR88 has a compressor on each of the
inputs that can be set to Off, 1 – 8 and Max. These settings vary from 1:1 to
6:1. These can be useful when dealing with large variations of speech input
level. On the highest setting even the quietest whisper can be heard at the
same volume as the loudest voice.
Equaliser
EQ Low. 12dB boost or cut of the low frequency components of the audio
signal with this, 200 Hz fixed frequency, shelving filter. This is useful for
adding warmth to a microphone or subtracting boom.
EQ High. 12dB boost or cut of the high frequency components of the audio
signal with this, 5kHz fixed frequency, shelving filter. This can be useful for
boosting dull sounding microphones, or reducing the sibilance of lively
microphones.
Output - Selection
Output. Selects if a channel is not used (Off) or goes to Output Bus X,
Output Bus Y, or Output Bus X + Y of the mixer. A pair set to stereo, are
treated in almost exactly the same way. When set to Output Bus X, the pair is
placed as mono onto output bus X. When set to Output Bus Y, the pair is
placed as mono onto the Output Bus Y. When set to Output Bus X+Y, the
pair is placed as mono onto the Output Bus X and as mono onto the Output
Bus Y. When set to Stereo output, the lower input channel number of the pair
is placed on Output Bus X and the higher input channel number to Output
Bus Y. When the output is set to OFF the channel is removed from detection
and priority. Because the monitor for a channel is active whenever the
channel is selected, setting the input channel parameters on a live system
without affecting the output is possible.
Priority Select Function
The priority of each microphone channel can be selected using this function.
Each can be set from 1 to 4. Channels set to the higher priority override
channels with a lower priority. The mode of operation for channels with the
same priority can be set in the system menu. This can be inclusive or
exclusive.
Microphones that are locked out or overridden are attenuated. The level of
attenuation can be adjusted using the gating level control for each channel.
Gating – Off Attenuation Level Control
Sets the level of 'off' attenuation (6dB - 40dB or muted) for each channel.
When the number of microphones in use is high it may be necessary to
increase the amount of "off" attenuation per microphone, to keep the total
ambient noise level low.