change audio route when the audio is playing

Question

I have an audio file that plays using avaudioplayer, I want to able to play the sound on the device receiver or speaker when the audio is playing when the user presses a button. How can I do that ? Currently it just plays on whatever was selected before the audio started playing.

Answer 1

UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
OSStatus result = AudioSessionSetProperty( kAudioSessionProperty_OverrideAudioRoute, sizeof(audioRouteOverride), &audioRouteOverride );
Assert(result == kAudioSessionNoError);

Answer 2

iOS 6+ version

NSError* error;

AVAudioSession* session = [AVAudioSession sharedInstance];

[session overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker error:&error];

Answer 3

You can add MPVolume control (link to documentation) to your user interface and set showsVolumeSlider = NO and showsRouteButton = YES.

User will have a route button to route the audio to a device of their choice.