API Audio 1608 Recording Console - Manual (Page 22)

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The controls for E1608 Echo Send section function as follows:
VU RET (Return): Routes the output of the Echo Return section to the meter in place of the
output from the Echo Send.
 Illuminates when engaged
T/B (Talkback): Allows the Talkback microphone to feed the Echo Send when the Talkback
microphone is activated
 Illuminates in blue when engaged
EXT IN (External): Mixes the ECHO SEND EXTERNAL INPUT from the rear panel with the output
from the corresponding auxiliary bus at the input of the Echo Send
 Illuminates when engaged
NOTE: There are two trim-pots on the odd number Echo Send/Return sections. These are not
labeled, but trim the calibration for respective Echo Sends.
3.2 Echo Return Section
AFL: Activates an AFL solo
 Illuminates when engaged
ON: On/off switch for the Echo Send
 Illuminates in green when engaged
LEVEL: Controls the output level of the Echo Send
The E1608 ECHO RETURN section is an independent audio channel
with multiple input options, complete level, muting, and panning
controls, full solo capabilities, and full routing to the Program and
Summing Buses. Some possible Echo Return applications include:
 Return path for external devices (multitracks, reverb/effects
units, etc.)
 Input path for tracking, overdubs, and virtual instruments
 Audio Sub-grouping (when used with the Echo Send section)
 5.1 mixing
The Echo Return section has the following features:
 Multiple input sources (including a switchable auxiliary
external input)
 On/off switch
 Level control
 Switchable pan-pot
 Solo (PFL, AFL, SIP)
 Solo Safe
 Patchable 500 Slot for 500 Series modules
 Routing from the Echo Send section
 Output assignments to the Program and Summing Buses
(ACA)
The Echo Return section can be fed from one of three sources:
 Echo Returns Input: ECHO RETURNS INPUT 1-8 sub-D
connector
 Echo Return Auxiliary Input: ECHO RETURNS AUX INPUT 1-
8 1/4” tip-ring-sleeve jack
 Echo Send Output: The output of the Echo Send section