I have roughly researched audio APIs for iOS. There are several layer APIs to perform audio capture and play.
My app needs a simple function like audio amplifier (needs delay around 0.2 Seconds). I don't need save record to file. I am not sure which way is more simple to implement it. Core Audio? Or AVfoundation?
How do I record audio on iPhone with AVAudioRecorder? I am not sure does this link working with my case or not.
While playing a sound does not stop recording Avcapture This link is playing other audio when recording. It is not suit my case.