Recording an audio

There may be several reasons to record an audio in an app. We could be processing the audio for speech recognition or we could just be making a game that requires some phrase from the user.

How to do it...

Our app can record audio using the MediaRecorder type, which can capture audio from a variety of sources and in various formats:

1. Recording any part of the user's surroundings, such as the audio, requires a permission:

   [assembly: UsesPermission(Manifest.Permission.RecordAudio)]

2. To record audio, we need a MediaRecorder instance with the audio source set to the microphone:

   var recorder = new MediaRecorder();
   recorder.SetAudioSource(AudioSource.Mic);

3. Then, we must specify in the format in which we want to persist the audio file:

   recorder.SetOutputFormat(OutputFormat.ThreeGpp);
   recorder.SetAudioEncoder(AudioEncoder.Default);

4. Next, we specify where to save the audio file using the SetOutputFile method:

   var path = FilesDir.AbsolutePath;
   path = Path.Combine(path, "Recording", "audio.3gp...