[alhardy]

I'll try to make it clearer

To test if delay compensation is working properly you usually do this:

take a track, duplicate it

On one track do nothing
on the second put a trim plugin and invert the phase.

hit play

If delay compensation works fine you should hear nothing (and this works)

Now take a cable from line output 1 and patch it back to line input 1
On one of the 2 tracks insert H/W line 1
No hardware patched, just a cable in/out

If delay compensation works fine you should hear nothing

This last step works perfectly on my HD system,
it's supposed to be working on the carbon, but doesn't

I do parallel compression and eq so I need tracks with hardware inserts to align perfectly without or phase will kill me.