AUDIO OPERATION
The THRESHOLD control sets the level of signal needed to open the
gate. Turning the control clockwise increases the gates sensitivity, i.e.
lowers the Threshold. The ideal setting will be a little above the loudest
peaks of the unwanted cross mic pickup or background noise. The THD
LED is illuminated while signal is above the set threshold.
ATTACK, (the time taken for the gate to open) can be switched be-
tween two ranges. The Slow attack range is suitable for most signals,
particularly vocals and bass instruments whilst the Fast range should be
selected for percussive sounds. Fine tuning of the Attack is done auto-
matically by the RA702 to match the dynamic profile of the material.
This semi automatic approach ensures optimum attack with the mini-
mum of adjustment.
The functions of hold and decay are combined in a single RELEASE
control.
The hold and decay parameters are perfectly proportioned across the
range of Release times. This avoids 'hunting' on signals around thresh-
old, and eliminates distortion when applying fast release to low frequen-
cy signals.
The HF and LF filters can be used for frequency conscious gating by
adjusting the frequency sensitivity of the side chain without affecting
the gated signal.
Use the HF and LF filters to roll off any frequencies which may cause
erratic gating. (e.g. snare drum channel - use HF to remove cymbals and
LF to remove bass drum, leaving a 'window' for the snare).
Use the MONITOR button to listen to the side chain signal while ad-
justing the filters.
The side chain trigger source, normally the input signal, can be
changed to the Ext Key input with the EXT/KEY button.
External triggering allows one track to modify the dynamics of another
track or tracks. (e.g. use the bass drum to Key a gated bass line).
