something changes in our earmixes from soundcheck to second set. If digital signals sent to earmixes on the network are separate from FOH manipulations on the mixer (pre-fader, pre-fatchannel, etc), then sound check should last to the end of the show. We are not using aux mixes from the board. Every channel 1-16 is routed directly to the earmixes. Does the board have earmix channel level control?