I mostly play with the catalyst plugged in usb to the laptop so I can stream backing tracks into the amp. I play the backing track and guitar together and everything comes out of the speaker fine. The issue is when I have Audacity recording the USB from the catalyst it only passes the Guitar. I have a NUX mG30 that does this as well but they added a usb loopback setting that sends the music and guitar together back over the usb. Does the Catalyst have a usb loopback function