🚀 go-pugleaf

Sang, apologies for not realising you were asking about AA 1.5 and misleading you.
I feel that I should repeat, though, that you really need to be able to monitor the guitar at the input end of things, which means using a usb or other interface that provides source monitoring. I've now looked at the Behringer manual and it doesn't look as if that unit does this (although it's a bit unclear).

I do exactly what you are trying to do ie record electric or acoustic guitar together with other instruments by recording multiple tracks and monitoring on headphones. There is a reason why there are so many small usb units with a couple of channels and mic and guitar inputs - they make this very easy. The manuals are available online from the likes of Tascam and Edirol and are worth a look.