API Audio 1608 Recording Console - Manual (Page 35)

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6.2 Monitor Source Selectors
The 845B Monitor Source Selectors (CR SOURCE) provide a choice of nine different sources to
feed the Control Room monitors. The selections are divided into three categories:
 Program Bus (PGM BUS)
 Echo Sends
 Six Channel Playback (6 TRK PLAYBACK)
The 845B Monitor Source Selectors function as follows:
6 TRK PLAYBACK 6TKAUX, 6TK1, 6TK2, 6TK3: Routes the signal
from the selected six-track playback source to the Monitor Control
section
 The input from the selected external six track playback
source connector on the rear panel is fed to the Monitor
Control section
 The selected 6-Track Playback button illuminates in red when
engaged
 6 TRK PLAYBACK 6TKAUX is currently inactive and is reserved
for future use
ECHO SENDS 1/2, 3/4, 5/6, 7/8: Routes the output of the selected
Echo Send to the Monitor Control section
 The Echo Send output is fed to the Monitor Control section
 The selected Echo Send button illuminates when engaged
PGM BUS (Program Bus): Routes the output of the Program Bus
Output Masters to the Monitor Control section
 The output from the Program Bus Output Masters are fed to
the Monitor Control section post the Stereo Master Fader
 Illuminates when engaged