Reply To: external sound card and built-in microphone [combine audio from multiple input devices]
Hi Tony, if your pedalboard acts like a USB audio interface (as seems to be the case for the model described at https://www.fivestarguitars.com/products/boss-gt-1#:~:text=Finally%2C%20the%20USB%20jack%20on,computer.), you don’t need a third-party virtual sound card.
If you just want to bring the guitar audio into your FarPlay session, select the pedalboard itself as the mic. If you want to bring the guitar audio and audio from a talkback mic into your FarPlay session, use the instructions linked above at https://farplay.io/mixer/?os=mac#multipleinputdevices to create an aggregate device that uses both your pedalboard and your talkback mic. Then, assign the aggregate device as the microphone in FarPlay.