Converting existing guitar track to MIDI in GarageBand

Hi - I’m new to the MIDI world and hoping to use MIDI Guitar 2 to convert existing dry electric guitar tracks to shareable MIDI files in GarageBand iOS. Is this possible, or is MIDI Guitar 2 only good as realtime tracking plug-in? I’m using GarageBand on my iPhone with an IRig 2 interface. Would I need to playback the existing tracks through line out on computer or amp back into GarageBand via iRig / MIDI Guitar 2?

unfortunately i don’t use ios or garageband, so i can’t provide any specifics.

in terms of realtime detection vs playback there’s no difference.

with a typical daw you wouldn’t need to route audio out and back. you’d put mg2 on a track and play the audio thru it. a second track is typically necessary to capture the midi output.