iPad and iPhone in the background

On iPad and iPhone the routing keeps running when you switch to another app, for example a synth or a lyrics app: the keyboard connected to AR Midi Patchbox keeps playing the synth in the foreground.

• To stay active, the app keeps a silent audio session open that mixes with other apps: it does not stop your music and does not show up as Now Playing.
• After a phone call, Siri or a headphone change, the session starts again by itself.
• If you close the app from the app switcher (swiping it up), its virtual ports disappear and routing stops. When you open it again, your setup is back as it was.