How to get AVAudioPlayer output to the speaker

Question

I\'m recording audio with AVAudioRecorder as seen in How do I record audio on iPhone with AVAudioRecorder?

I then use AVAudioPlayer to play back the recording. Howev

Answer 1

this is the key line to output auido in speaker instead in microphone. Note it should be set while recording

try AVAudioSession.sharedInstance().overrideOutputAudioPort(AVAudioSessionPortOverride.speaker)

Below is complete function to setup recording

private func setupRecorder() {

    if isAudioRecordingGranted {
        let session = AVAudioSession.sharedInstance()
        do {

            if #available(iOS 10.0, *) {
                try! session.setCategory(.playAndRecord, mode:.spokenAudio)
            }
            else {
                // Workaround until https://forums.swift.org/t/using-methods-marked-unavailable-in-swift-4-2/14949 isn't fixed
               session.perform(NSSelectorFromString("setCategory:error:"), with: AVAudioSession.Category.playback)
            }
            try session.setActive(true)
            try session.overrideOutputAudioPort(AVAudioSession.PortOverride.speaker)

            let settings = [
                AVFormatIDKey: Int(kAudioFormatMPEG4AAC),
                AVSampleRateKey: 44100,
                AVNumberOfChannelsKey: 2,
                AVEncoderAudioQualityKey:AVAudioQuality.high.rawValue
            ]
            audioRecorder = try AVAudioRecorder(url: fileUrl(), settings: settings)
            audioRecorder.delegate = self
            audioRecorder.isMeteringEnabled = true
            audioRecorder.prepareToRecord()
            self.recorderState = .Ready
        }
        catch let error {
            recorderState = .error(error)
        }
    }
    else {
        recorderState = .Failed("Don't have access to use your microphone.")
    }
}