How to enable your iPhone's microphone for iTalk Recorder in iOS7
To allow iTalk recorder to have access to your iPhone's microphone, simply go to your iPhone's Settings>Privacy>Microphone and enable iTalk Recorder.
NOTE FOR iOS 7 Users: When launching this app for the first time (either as a new purchase or following your device's OS upgrade), please tap OK when iTalk requests permission to access your device's microphone. If you're experiencing blank recordings, please ensure Microphone access is enabled. In the app, go to Settings>Privacy>Microphone and enable iTalk.