In your AppDelegate:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
//Stop app pausing other sound.
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord
withOptions:AVAudioSessionCategoryOptionDuckOthers | AVAudioSessionCategoryOptionDefaultToSpeaker
error:nil];
}
Where you are allocating AVCaptureSession:
AVCaptureSession *session = [[AVCaptureSession alloc] init];
session.automaticallyConfiguresApplicationAudioSession = NO;
This code will allow you to play background music and run AVCaptureSession with the microphone.
SWIFT UPDATE:
AppDelegate:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
//Stop app pausing other sound.
do{
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayAndRecord,
withOptions: [.DuckOthers, .DefaultToSpeaker])
}
catch {
}
return true
}
Where you are allocating AVCaptureSession:
let session = AVCaptureSession()
session.automaticallyConfiguresApplicationAudioSession = false