To put what I wrote in practical terms:
• Choose an <EMPTY> preset on your FM3
• Choose FM3 USB IN3 as input and FM3 USB OUT1 / OUT 2 as output.
That works with the Neural DSP Abasi standalone amp I have on my Mac. I think I wouldn't use it anymore because the FM3 sounds 500x better, but at least I can provide some help . Please also see the attached screenshot for further details.
View attachment 77676
I'm at a loss.Assuming you've got your guitar connected properly to the FM3, DI input to the computer should be on channel 3. Make sure you're using the usb B port, and you'll need to monitor input to hear anything.