A variable controlling the audio category on iOS and Mac OS X
Defined in SDL_hints.h
#define SDL_HINT_AUDIO_CATEGORY "SDL_AUDIO_CATEGORY"
This variable can be set to the following values:
For more information, see Apple's documentation: https://developer.apple.com/library/content/documentation/Audio/Conceptual/AudioSessionProgrammingGuide/AudioSessionCategoriesandModes/AudioSessionCategoriesandModes.html