问题
I'm trying to access sound volume data from the microphone in realtime. I've tried AVAudioPlayer but it only monitors sounds from a source like an mp3 and not from a microphone. I've also tried The SpeakHere app but it's proving to be much tougher to understand with all the Objective C++ syntax (i'm a newbie). Is there another class similiar to the one in SpeakHere but written only in Objective C?
回答1:
sc_listener is deprecated. The correct answer today is to use AVAudioRecorder. This tutorial explains how to use it.
回答2:
Erik's answer is correct. Here is a reusable implementation using this method as a recognizer/delegate.
https://github.com/picciano/iOS-Audio-Recoginzer
来源：https://stackoverflow.com/questions/1155010/realtime-microphone-sound-level-monitoring