Profile photo of mdsaudio

Hi Mika,
The comb filtering you noticed is normal when double bussing a signal to one output. This is normal for any digital console due to differing latencies on the two signal paths. Double bussing is usually considered bad practice, is there a particular reason you are wanting to do this? With correct gain structure it should never be necessary. If you are using the group to feed a separate physical output it should be unassigned from L/R.