Re: Decklink Studio, Mixer, Y cable?? PLEASE..

Tony, please read my post again.
I guarantee that the problem you are experiencing is because your mixer does not terminate Sleeve to Ring on the unbalanced 1/4" inputs.
Apart from the "distortion" you describe, the other big clue is that they are using TRS connectors for inserts and almost certainly using the same component part for the line inputs.
You could "fix" the mixer by opening it up and soldering a wire between Sleeve and Ring (either on the socket or the PCB, whichever is easier).
Or you should use standard 1/4" TS (mono) jack to jack cables (which obviously connect Sleeve and Ring by design).
I have to agree with you that Bobs posts have been somewhat misleading and unnecessarily sarcastic, patronizing and derogatory. This is why I posted my response to clarify the facts for you.
Glad to hear you are getting an Allen & Heath, the Zed 14 in particular is a good mixer and excellent value.