Add some stuff to access inputs with wasapi backend

[Fredemus]

Tested by creating a processor playing an audio file on the ADAT out output and one recording it back from my ADAT in on my interface, seemed to work perfectly

[BillyDM]

Also, I realized I could simplify the conditional serde derives, so you might need to fix some conflicts.

[Fredemus]

Also, I realized I could simplify the conditional serde derives, so you might need to fix some conflicts.

Did you have any other feedback on this?

[BillyDM]

Sorry for taking a while to get back to this.

If you're okay with it, I can send a PR to your fork with the changes I'd like made. Once that is done, I can merge this PR into main.

[Fredemus]

Yeah that's totally fine