Legacy AXS API
The diagram on the previous page shows the basic Stereo Program Bus signal flow from
channel Program Bus assignment, through the stereo Masters and Grand Master, to the 2Track
Inputs.
624SM Stereo Program Master Module
The 624SM Stereo Program Master Module contains
the controls for the three stereo Program Buses as
well as the stereo Grand Master.
Each of the four stereo Program Masters is
equipped as follows:
ON: ON/Off switch for the Program Master output
• Illuminates when engaged
INS (Insert): Routes the Program Bus Insert
Return to the Program Master
• Illuminates when engaged
GM (Grand Master): Routes the output of the
Program Master to the Grand Master Program Bus
• Illuminates when engaged
CAL LT & RT (Calibrate Left & Right): Left-Right
calibration trim pots for the Bus Master output
EXT (External Input): Routes the stereo signals at
the GM EXT IN patch points directly to the Grand
Master summing bus.
• Grand Master only
• Illuminates when engaged
The three stereo Program Buses may be fed simultaneously from the following sources:
• Small Fader path output
• Large Fader path output
• Stereo Returns 1-6
Stereo Program Bus assignments from channels are made on the 624 Bus Assignment Module. Stereo
Program Bus assignments are made direct.
Stereo Grand Master
A stereo Grand Master Bus and Master Fader are provided to facilitate a wide range of operations. The
Program Masters, Stereo Returns, and an External Input can be routed to the stereo Grand Master Bus
for summing to a master stereo program output.
The following stereo sources can be routed to the Grand Master Program Bus:
Stereo Program Master A
Stereo Program Master B
Stereo Program Master C
Stereo Returns 1-6
External Stereo Source (on patch)
Routing to the Grand Master from the stereo Program Masters or Stereo Returns is accomplished by
engaging the GM button.
An external stereo line-level source can be routed to the Grand Master by patching the source into the
GM EXT IN patch points and engaging the EXT button in the Grand Master controls. The will route the
external source directly to the Grand Master summing bus.
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