"It has a fixed layout where you turn processing on if you need it but you can't move any of the processing elements around or insert another processor anywhere. You can't have one thing duck another (I wanted voices to carry over music playback) and you can't have two feedback hunter/killers in place as there is only one 'MIC' subgroup routing through one 'FBS' element."
Jeepers. Remember JM's 'history of trying to steer TOA from the wrong direction' that he gave us outside AES in SF last fall ? This supports his "tale of woe" quiet well.
I just looked further into this device and they only provide 2 bands of PEQ (plus a HPF) on each input. Outputs have up to 6 bands of PEQ which may be enough..... but who knows until you get there ? What a knuckleheaded thing to do !
But (then again): how many other multifunction DSP systems have a built in "echo effect" ?
What in blazes does the Hysteresis control do on the Gate function ? Update: I googled and discovered the application of "hysteresis" in noise gates. My bad.
"The Allen & Heath iDR-8 offering has the advantage of a much more flexible DSP drag and drop architecture and its remote fader panel is less cluttered."
not to mention smaller and cheaper (remote).
"My client has already expressed his preference for the less expensive solution (as expected.)"
So you at least accomplished that. Good.