Hello, I am having some annoying issues. I basically just want to record a clean guitar track then play it back into external rack effects and record the result. I am using an Editor UA-25EX if I take the output put it into the external effects then plug the return into input 1 it feeds back Had (what I thought was) a logical solution and borrowed a Tascam US-122 the idea being have the Edirol for input the Tascam for output thus eliminating the feedback issue. Is a brilliant plan EXCEPT when I set up the devices Logic Pro no longer records anything from the Edirol (even though the peak light on the Edirol can be seen). The only solution to that is to unplug the Tascam reboot the mac then Logic Pro records from the Edirol. Closest I came to a solution was to create an aggregate device of the Tascam and Edirol, then play the track using output 2 of the Edirol and put that into input 1 of the tascam. Something comes through but it is quite and distorted. What confuses me the most about the dual audio interface issue is technically Logic Pro 9 IS using two different audio interfaces as standard as the output is set to "internal speakers" and input to the Edirol!! How in seven different types of cheese are you supposed to take clean tracks and apply external effects and record that output as a separate track? ??