Studer OnAir 1500, Operating Instructions Manual

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OnAir 1500 Digital Mixing Console
5-38 Operation
Document generated: 06.08.14 SW V6.0
5.7.1.2 Logical Audio inputs
Logical audio inputs are the link between the physical audio inputs and the
input router. Only logical inputs/outputs can be routed and will be visible on
the operating surface.
Because the logical audio input holds the channel parameters, a logical input
can be assigned
only to one
channel at a time. However, it is possible to have
more than one logical audio input with the same physical audio input line.
The example below shows one logical stereo input (CD 1), and two logical
mono inputs (EXT 1, EXT 2) that consist of the left and right signals of one
physical AES/EBU input (AES 1).
AES/EBU PCB
AES 1
1 L
1 R
#
CD 1
EXT 1
EXT 2
CD 1
EXT 1
Physical Inputs Logical Inputs
2 R
2 L
EXT 2
Input Router
Input-related Channel Parameters Every logical audio input holds its own set of channel parameters, even if it
is currently not routed to a channel. If a previously un-routed logical audio
input is re-routed to a channel, its last parameter settings (such as gain, EQ,
dynamics, etc.) are automatically activated. The fader setting and the status
of the
ON
and
PFL
keys remain at the current channel status.
CD 1
MIC 1/2
IN
De-S
EQ
DYN
AUX
IN
De-S
EQ
DYN
AUX
IN
De-S
EQ
DYN
AUX
MIC 3
CD 2
IN
De-S
EQ
DYN
AUX
Logical
Inputs
Physical
Inputs
Sources
Input
Router
Physical
Console
Channels
1 2 3
IN
De-S
EQ
DYN
AUX
#
The following information affects the routing and is contained in the configu-
ration of a logical audio input:
• Input label
• Format (mono or stereo)
• Left-channel audio input (physical input)
• If stereo: right-channel audio input (physical input)
• Listen only (inputs that can not be routed to channels, used e.g. for moni -
toring)
• Talkback audio signals.