GNOME Bugzilla – Bug 791568
osxaudiosink, cannot set output route on iOS
Last modified: 2018-07-04 08:45:12 UTC
on android using openslessink you can set stream-type property to specify the audio output device, for example setting stream-type to 0 you can output the audio to the speaker you hold to your ear when on a phone call. This is not possibile on iOS, would be good to have this support on iOS too
this seems not possibile using coreaudio, probably a new AVFoundation based audio sink is needed
the output device can be changed using AVAudioSession sharedInstance inside the app that use osxaudiosink