I am on the latest build, 9.0.5.45603
Before I updated to OS 9 (the one that added USB interface function), I usually used a 2nd guitar thru the return input, along with mine in the front input, when I give guitar lessons, or have a quick jam, I used a small guitar rig (OD, pedal sim amp -iridium- and a reverb pedal) for the other guitar, It is pretty efficient and I used the A/B slots for whatever effects I needed to add for the 2nd guitar.
But it has been a while since I have done that, but last time I did it worked, and after I updated to OS 9, I needed to use it in that manner again but it is not working, A and B are not doing anything at all for the other guitar in the return input, I also tried XLR and 1/4 inch return inputs, I fiddled with all the related controls, nothing is happening, the sound is coming thru from the 2nd rig, , but A/B are useless, also they are not being used by the main guitar signal path when I max the Parallel path Mix knob clockwise.
Is anyone else having this problem? Am I doing it right? or Am I missing something that changed when they added USB functionality?