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Its parameters are:
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REF SOURCE: selection of input channel(s) with microphones picking up ambient sound.
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MAXIMUM GAIN: maximum level of gain to be applied.
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MINIMUM GAIN: minimum desired gain level of the signal.
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GAIN-SENS RATIO: attenuation or gain ratio.
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SPEED: speed at which the ANC module will perform gain correction.
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TRIM: adds gain or attenuation to the output resulting from the ANC module.
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NOISE THRESHOLD: REF SOURCE level above which the ANC module is activated.
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DISTANCE: physical distance between the REF SOURCE and the local signals.
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ON/OFF: enables or disables the module. If OFF (disabled) the input signal is not processed and is
passed on to the next processing module.
On the left you can see the combination of the parameters graphically.
DSP MODULE - FILTER (FILTRO)
Each output channel has a high and low pass filter. Unlike other equalisers that raise or lower frequencies, a
pass filter allows parts of the frequency spectrum to be filtered out. There are two main types of pass filters:
high pass filters (HPF), which only pass frequencies above a certain point, and low pass filters (LPF), which
only pass frequencies below a certain point. In this module you will find the same parameters for both filters,
on the left for the LOWPASS low pass filter and on the right for the HIGHPASS high pass filter.
Its parameters are:
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FREQ (Hz): filter cut-off frequency.
NOTE: for BESSEL and BUTTEWORTH filters the cut-off frequency is defined as -3 dB and for a
LINKWITH-RILEY filter it is defined as -6 dB.
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GAIN (dB): gain boost or attenuation at the set centre frequency.
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TYPE: type of filter: BESSEL, BUTTERWORTH or LINKWITZ-RILEY.
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SLOPE: attenuation values of the transition zone of the filters. There are 8 attenuation values: 6, 12, 18,
24, 30, 36, 42 and 48 dB/Oct.
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ON/OFF: to enable or disable the low pass or high pass filter independently.
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