Allen&Heath GL4800 USER GUIDE - Manual (Page 30)

30 GL4800 User Guide
The Mute System
Each GL4800 input channel, group, aux send and main output
(L,R,M) is provided with a mute switch. This turns the audio signal on
or off.
The GL4800 provides a 'soft' mute system controlled by a built-in
microprocessor which gives far greater control and versatility than the
conventional systems found in other consoles. A ramped FET audio
element on each channel provides silent muting under control of the
microprocessor. The red LED in the mute switch always indicates the
status of the channel (illuminated = muted, off = not muted). A green
SAFE/PREVIEW LED under each mute switch indicates which
channels have been made 'safe', or which channels are selected within
a group or snapshot.
Operational Features
MANUAL MUTING - Press a mute switch to turn a channel on or off.
The switch cap illuminates if the channel is muted. You can also turn
off (clear) or turn on (set) all the console mutes with a single key
press.
8 MUTE GROUPS - Combine selected mutes under control of a
master pushbutton. Includes a preview function to check group
settings before selection. Individual channels can be made 'safe' so
that they are not affected by the groups. If not used the mute group
section can be disabled to prevent accidental operation.
128 MUTE SNAPSHOTS - Store and recall the console mute
settings in numbered snapshots. Includes 3 digit display, preview
function, channel 'safes', and disable.
MIDI INTERFACE - In, out and through sockets to interface with
external sequencers, effects and control devices. Includes MIDI dump
to archive and recall console settings.
SOLO-IN-PLACE - Check the contribution of individual signals within
the main mix 'in place' by pressing the associated mute switches.
Includes a separate 'safe' facility so that selected channels are not
muted when solo is activated. A two key 'press and hold' prevents
accidental operation. The last solo setting can be recalled for instant
comparison with the mix. Solo-In-Place can be disabled if required.
Power Up and Power Down
The mute settings are remembered when power is removed from the
console. A power down circuit detects falling voltage and writes the
settings to non-volatile memory. On power up these settings are
restored. The mute group, snapshot, channel safes, and mode
settings are held in similar memory.
EDIT
SAFES
EDIT
GROUP
PREVIEW
RECALL
PREVIEW
STORE
IN-PLACE
SOLO
SNAPSHOT
<
>
MIDI
CHANNEL
ACTIVE
PATCH
MODE
SHIFT
SCENE
GROUPS
DISABLE
AUTO
INCREMENT
DISABLE