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A
DVANCED
I
NSTALLATION
ASPI Digital - The Sound of DSP Technical Support: 404.892.3200 23
To use the internal EF1210 Record mixer, the output of the automixer must be
brought in to the A
MIX
I
N
input on the EF1210. The input to the CODEC can come
from the automixer output as well or may be taken from the T
O
CODEC output of the
EF1210. The R
EC
output will carry a mix of the A
MIX
I
N
and the AEC A signals.
Alternatively, you can do this mixing externally (connect playback output of external
program audio device to an automixer input). If record and playback signals are gen-
erated using an external mixer, the A
UX
I
N
and A
MIX
I
N
inputs and the R
EC
and T
O
CODEC outputs will not be used on the EF1210.
Playback and record are only available with the Reference A (AEC A) and Zone A
signals. If two zones are used, playback will NOT function properly in Zone B
because it will only be added to Reference A input signal from the far-end.
Using playback and record in the second zone of a multi-zone system will require
using the matrix mixer to create appropriate mixes outside of the EF1210.
See Figure 7 on page 23 below for the interconnection of A
UX
I
N
and R
EC
input and
output, respectively.
To record,
Connect the R
EC
output of the EF1210 to the audio input on the recording
device.
Connect A
MIX
I
N
to the output of the automixer or matrix mixer.
Connect T
O
C
ODEC
to F
ROM
AEC on the EF200 or the input of the CODEC.
For playback,
Connect the A
UX
I
N
of the EF1210 to the audio output of the playback
device.
Connect A
MIX
I
N
to the output of the automixer or matrix mixer.
Note.
If the EF1210 A
UX
I
N
is not used, the playback signal should be
mixed with the AEC Reference signal rather than with the Zone
output signal for local playback.
Figure 7.
Playback and Record in the EF1210
EF1210
+ ++
GainGain
Aux
In
Rec
To
CODEC
Amix
In
Level
adjust
Ch 5
AEC
Ch 6
AEC
Level
adjust
Line
AEC
Reference
B
+-
A/D
AEC
Reference
A
+-
Line
A/D
Ch 3
AEC
Ch 4
AEC
. . .
. . .
25


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