The scenario is that I start the recording at in my iphone app maybe by using AVAudioRecoder and when i have some input sound above certain threshold then i will do some thing. Is it possible to process the input audio while recoding??
Is there any way to know the input loudness in iPhone. Like what is the level of the loudness in numbers or if there is any other measure for that.
Look at AVFoundation, AVAudioRecorder and enable the property meteringEnabled to get threshold change callbacks.