Couldn't hear AVAudioRecorder's voice without headphones

Question

I am recording voice on iPhone using AVAudioRecorder and these are my recorder settings:

 NSMutableDictionary* recordSetting = [[NSMutableDictionary alloc] init];
    [recordSetting setValue :[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey];
    [recordSetting setValue:[NSNumber numberWithFloat:16000.0] forKey:AVSampleRateKey]; 
    [recordSetting setValue:[NSNumber numberWithInt:1] forKey:AVNumberOfChannelsKey];

The problem is that I can't hear the recorded voice without headphones. I want to be able to hear the voice without headphones also. How should I change my code?

Answer 1

Maybe force-routing the audio output to the speaker will help?

- (void) forceRouteAudioToSpeaker
{
    UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
    AudioSessionSetProperty(kAudioSessionProperty_OverrideAudioRoute,
        sizeof(audioRouteOverride), &audioRouteOverride);
}

Don’t forget to include <AudioToolbox/AudioServices.h>. On second thought, switching the audio category to plain playback should also do the trick, and you say it didn’t…