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I found this (I don’t know if it’s a bug or absence of a feature):
on a group (mono or stereo), I have aux sends, but not efx sends!
For me it’s more practical; create a 6 mic’s stereo group and called “choir” and then put reverb on it (not on the single channels).
I know I can insert the efx on the group, but why do I spend another efx, if my “vocal verb” is already present on the board?

thanks in advance, regards.