Low recording volume in combination with AVAudioSessionCategoryPlayAndRecord

Question

When I set:

[[AVAudioSession sharedInstance] setCategory:
    AVAudioSessionCategoryPlayAndRecord error:NULL];

…recording and playing works

Answer 1

In my case in addition to using AVAudioSessionCategoryOptionDefaultToSpeaker option I had to remove changing audioSession mode from AVAudioSessionModeDefault to AVAudioSessionModeMeasurement.

So if you are using modes other than AVAudioSessionModeDefault, be careful.