I have been on the phone with Tascam trying to figure out why external effects will not appear where I want them to. For example, I take a 1/4 inch cable out of the EFFECTS SEND 1 and hook it to the input of my Behringer effects unit. Then I run another 1/4 cable out of the Behringer, and back into Track E (which is track 5) on the back of the NEO. No matter what I do, how I set the Post or Pre or whatever controls, and no matter how I monitor what I am doing, there is no effect coming back into the Tascam. The effects unit works fine, as do the cables. Tascam cannot explain why the unit will not accept the effects. I think the design is weak!
PS - I was looking at buying a newer Tascam unit, but if they can't make effects routing logical like on (much) older recorders, than why even consider them?