Hello,
I’d like to know if your software only works with clean guitar direct input, or if the signal can also be distorted or processed with effects. Background: I want to use it, among normal usage, for converting guitar stems after stem splitting, and this signal can sound like an acoustic guitar, a clean electric guitar, slightly distorted, or with some effects like reverb or chorus, or even heavily distorted. Should that also work?
MIDI Guitar 3 is trained on a clean signal. You should not use any effects in the signal chain leading into MG3.
Audio processing of the clean guitar signal should be done inside MIDI Guitar3, on a chain, using VSTs/AUs.
Using stems as an audio source could work, but it all depends on how much the sound is processed. Even a very subtle reverb can mess things up, so I am not going to leave you with the impression that this is an unproblematic route to take. It can work, but most likely, and for most cases, you will spend a lot of time editing the output quite a lot (depending on what you intend using this for).