The iEFIS lite audio out produces a signal that is too high to be connected directly to the V16 aux audio in. A 10:1 resistive divider was recommended by MGL. By adding the network shown below and adjusting to aux audio level on the V16 I was able to get a reasonable audio quality and reduce that clock noise.
There is another post on the same problem today. The drawing showing the divider is incorrect.
iEFIS Lite Audio out noise
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