Hello,
I would like to port my app to work as AudioUnit V3 instrument, but going through the documentation I came across some potential obstacles:
As I understand, the app extension must be bundled with the App and provide sound engine and UI. That means the App itself is reduced to a slim host loading an instance of my AudioUnit. Hope I got that right.
Got several problems with that:
- In-App purchases:
Some content needs to be purchased. That means it should be possible to use StoreKit functions from within the extension - is that possible?
Furthermore, as the App is currently already sold, the existing purchases must be respected. As the App and the AU extension will likely have different IDs, I have no idea if that could work. It would be OK if purchases need to be restored within the AU extension.
- Playing:
In the 2015 WWDC video, it was discouraged to offer a keyboard in the custom view as the host / GarageBand shows its own and will not record from the custom view. However, my specific app requires a special UI for playing that is different from a normal keyboard. If I show this, will the host listen and record MIDI from it?
The specific app is called iOptigan, would gladly provide promo code to anyone curious and willing to help.
Regards,
Stefan
