4: Element Operations • 74
©2008 Axia Audio — Rev. 3.0
Control Room Operator Mic Channel Operation
The Control Room Operator microphone is the
board operator’s mic. It’s always located in the Control
Room, so activating a channel designated as the CR Op-
erator mic affects Studio 1 monitor speaker and Preview
speaker muting.
When the board operator pushes a Talkback key, all
output bus assignments for the Control Room Operator
microphone are temporarily muted, while his mic’s au-
dio is routed to the requested Talkback destination. Re-
leasing the button returns the channel outputs to normal.
(Pushing your own Talkback key does nothing.)
Pressing the channel On key for the CR Operator
Mic while the channel is already on will mute the chan-
nel until the button is released, acting as a “cough” func-
tion for the board operator. On-air status and speaker
mutes are unaffected by this action. The CR Operator
microphone channel will mute both the Studio 1 speak-
ers and the Preview speakers whenever the channel is
On, or if Preview or Record Mode Engage keys are
selected.
The block diagram for this channel selection is
shown in Figure 4-33.
Producer Microphone Channel Operation
The Producer’s microphone is meant to be used at
position within the Control Room where a morning
show or talk show producer would normally sit. This
mic type mimics the operation of the Control Room mic
described above, but does not include the “cough” func-
tion; also, a Producer mic can use Talkback to talk to
the board op, but cannot talk directly to the Monitor 2
talkback channel.
Control Room Guest Microphone Channel Operation
There are often microphones in the Control Room
other than the board operator’s; i.e., an in-studio guest
wing, or perhaps an announcer located physically near
the board op. These microphones control the muting of
the Control Room monitor speakers.
The Studio 1monitor speakers and Preview speak-
ers will mute when this channel is turned on, or when
Preview or Record Mode are selected. Control Room
Guest mics can be turned on and off remotely, and pro-
vide on/off status to a remote logic device. Remote Talk
and Remote Mute functions are also provided, and can
be activated using a remote On/Off/Talk/Mute panel.
Remote Talk lets talent and guests communicate
with the board operator. When Talk is remotely activat-
ed on a CR Guest mic channel, outputs to program buses
for that channel are muted and the mic audio is fed to the
Talkback bus. While this is active, the Status Symbol on
the guest’s fader strip displays a T icon. When the user
stops talking, the channel returns to normal. The opera-
tor can then reply using the fader’s Talkback key.
When the Remote Mute function is activated, the
Status Symbol displays X, and all the channel outputs
are muted until the command is released.
Control Room Guest Microphone channels will mute
the Control Room speakers and the Preview speakers
whenever the channel is On, or if Preview or Record
keys are selected. If only the Phone key is selected, the
Control Room speakers will mute independently, leav-
ing the Preview speakers un-muted.
Finally, Control Room Guest Microphone channels
have provisions for an individual Headphone feed. This
is especially useful for talent and guests in the same
room as the board operator; their headphone feeds will
all monitor the audio selected on the Monitor 2 selec-
tor, but the board op can communicate with each person
privately using Talkback key on their fader strip.
The block diagram for this channel selection is
shown in Figure 4-34.
Studio Microphone Channel Operation
The third type of mic channel is a Studio Microphone.
This mic is typically located in a location separate from
the control room — perhaps a voice-over booth, a talk
studio separated by glass, or a news booth.
Logic for Studio Microphone channels is identical
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