Allen&Heath GR1 USER GUIDE - Manual (Page 12)

GR1
USER GUIDE
12
PRIORITY DUCKING SYSTEM
The GR1 offers a flexible ducking system that allows one or a combination of the 3
mono channels to duck (override) the level of the other channels by reducing their level
by a pre-determined amount. For example this may be used for voiceover anouncements
where the background music is dimmed by the microphone signal level. The channel
or channels that cause the ducking are selected by pressing the front panel PRIORITY
switches. The selected channels are themselves disabled from ducking when this
switch is pressed. Any channel may be disabled from ducking by setting the internal
jumper link.
OPTION LINKS - INDIVIDUAL DUCKING DISABLE FOR CH1 TO 6
OPTION LINKS - DUCKING DEPTH AND RELEASE TIME
Select the required amount of ducking effect: -6dB, -12dB, -18dB. The time taken for
the ducked signal to return to normal level is set by the FAST/SLOW link.
COMPRESSOR / LIMITERS
Each of the 3 main outputs has a high performance compressor/limiter
which may be selected in or out of circuit to provide overload protection
(limiting) or signal dynamic range compression. These may be linked for
stereo operation. Each has a front panel LIMIT indicator that illuminates
when compression or limiting takes place.
OPTION LINKS - SIDECHAIN SOURCE
Selects the source that controls the limiter:
OUT, L(R,M), or L+R for stereo link.
OPTION LINKS - COMPRESSION RATIO
10:1 limiting - a level increase of
10dB causes only an output rise of
1dB above the threshold level.
4:1 hard compression
2:1 soft compression
OPTION LINKS - STEREO LINK
Set as 'L TO R' for stereo link.
OPTION TRIMMER - THRESHOLD LEVEL
Sets the level at which compression or lim-
iting occurs. From -30dB to +15dB.