The Pitch Perfect app is the result of Intro to iOS App Development with Swift lesson of Udacity's iOS Developer Nanodegree course.
The app allows users to record a sound using the device’s microphone. It then allows users to play the recorded sound back with six different sound modulations: Chipmunk, Vader, Slow, Fast with Reverb and Echo effect.
The app has two view controller scenes:
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RecordSoundsViewController - consists a record button with a microphone image. Tapping this microphone button starts an audio recording session and present a stop button. When the stop button is clicked, the app completes recording and then show the PlaySound controller.
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PlaySoundsViewController - contains six buttons to play the recorded sound file with different effects and a button to stop the playback.
The application uses code from AVFoundation to record sounds from the microphone (AVAudioRecorder) and play recorded audio with effects (AVAudioPlayer, AVAudioEngine).