SoundCraft Si impact User Manual page 59

User Manual 7.2.1: ACS INPUT SECTION
DSP ELEMENTS > ACS > INPUT
Phase Invert
Invert signal phase (180 degrees).
Pressing and holding the key will activate Interrogate mode for this function (see Mix Features 8.3).
GAIN/TRIM
Adjust mic gain or line trim for input channels.
The control changes its function depending on the selected input. Mic Gain (-5dB - +58dB) is applied in the
analogue domain, before analogue-to-digital conversion. It is only applicable to Microphone inputs. Line input
trim is applied after conversion (-10dB/+16dB).
HPF Frequency
Adjust the cut-off (-3dB) frequency of the High Pass Filter.
This filter 'cuts' low frequencies according to an 18dB/Oct slope that turns down just before the cut-off frequency.
Use it to filter out low frequency 'rumble' and clean up live microphone feeds, for example.
HPF On/Off
Switches the High Pass Filter on and off.
Pressing and holding the key will activate Interrogate mode for this function (see Mix Features 8.3).
7.2.1: DSP ELEMENTS > ACS > INPUT