IPhone: How to play a sound that ignores the volume and ringer settings?

Question

The FoneHome app can do both:

• ignore the ringer switch when it is off.
• high-level playback, regardless of the system volume setting.

I see documentation about playing an audio session category, not related to the ringer switch, but not to the volume. Can someone enlighten me?

Answer 1

It is technically possible to change the volume of the system through the private AVSystemController class in Celestial.framework, but causes problems with the Apple approval process. FoneHome was recently filmed - perhaps because of this reason there were between them and Apple.