Cross-talk in Makie mixers
The 1604 is a popular mixer in Avid suites because it has loads of facilities (lots of channels, auxes, four groups etc.) but they cross-talk between the two track return and the mono input channels. Today I was in a suite and there is a lot of bleed at only 35dBs below if you are using the 2TR return button to listen to the output of the Avid and at the same time digitise via the mono-channels and stereo bus you get an awful lot of cross-talk. Putting a balancing box in line with the 2TR return sorted the problem so I assume the bleed is back out of the 2TR input.