found this thread on google
as I'm looking at upgrading from a UC to a UFX and was curious about recording effects
1) you're being very confusing when you explain your problem
2) I think you're misunderstanding how loopback works
now, I don't own one of these yet.. but reading your posts and comparing them to what people are telling you to do
my guess is that you're arming the wrong channels in Logic for record.
my understanding is "Loopback"
is a digital equivalent of connecting a hardware output from the interface into a hardware input using a patchlead..
..but without having to unnecessarily fiddle with patch cables at the back of your rack
or deal with losses due to unnecessary analog conversions
so if you're sending effects to output 3/4 and you have loopback switched on
you're kind of 'tricking' the computer into seeing the effects on input 3/4
(as if the signal had been sent out of output 3/4.. plugged into an external reverb unit.. and the output of the reverb unit is then connected to your interface inputs 3/4)
example.
if you are recording from physical input number 9
and you're sending the effects to output 3/4 with loop back on
you want to record enable inputs 3/4 inside logic
to record the wet signal
and record enable input 9 in logic if you want the dry signal
it may be a good idea to record both, as then you have a dry signal available in future in case you decide to change what effects you want to use on that track without having to repeat a performance.
and you can easily rebalance wet and dry levels (which is useful for effects like Reverb and Delay) while mixing
I hope this is of help
--Andrew