The default routing of the EFBus will be sufficient for our design. However, for clarity, the labels have been
changed to reflect the signals that are placed onto the bus and all unneeded cross-points have been muted.
Since the EF2280 uses the W and Y buses to send microphone, codec, and program audio to the EF2201 and
the ID of the EF2280 is 00, the audio signals WB0 and YB0 need to be routed to Inputs WM0 and YM0 of
the EF2280. Remember that the signals that a unit places onto the EFBus is put into a placeholder where
that placeholder is identified by the Device ID of the unit that put the audio signal into this placeholder.
Here, the EF2280 placed audio onto the W and Y buses and since the unit has a device ID of 00, the
placeholder is identified as WB0 and YB0 where the "B" stands for bus. The EF2201 takes that signal from
the bus and internally assigns that signal to one of three mixes for the W Bus (WM0, WM1, or WM2) and
one of three mixes for the Y Bus (YM0, YM1, or YM2) where the "M" stands for mix. By default, WM0 and
YM0 are routed to Output T of the matrix mixer, so we will keep that default routing and use the WM0 and
YM0 mixes for this example.
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