Simple Audio Recorder + Speech Synthesizer

A simple audio recorder + speech synthesizer that utilizes essential functionalities of AVFoundation, and a little bit of AVAudioEngine for real-time audio effect processing.

Hacked in a day while learning more about AVFoundation.

Can:

• Record 2 channel audio at 44100, linear PCM
• Play back what just recorded immediately
• Toggle a text to speech player with an Australian accent
• Change the pitch and speed of the speech synthesizer in settings
• Change the pitch and reverb dry/wet of normal recordings in real-time during playback
• View and play recorded file in a separate tab
• Delete recorded files
• Handle audio route changes or app state changes accordingly using AVAudioSession and notification observers

interface

recording

recorded files, tap to play

speech synthesizer

settings page

Cannot:

• alter speech synth speed/pitch in real-time

Future work (probably in a another project):

• refactor the heck out
• nice to support recording in different formats/samplerates