Checking Microphone Volume in iPhone

How to check whether microphone is mu开发者_运维问答ted before recording audio in iPhone?

Actually, you don't have to. You have to "warn" AVAudioSession that you are going to record a bit of Audio. Doing so, even if you are muted (on the IPhone, I Have not tested this with any external device) you will be able to record your audio... here is the piece of code that does that:

[[AVAudioSession sharedInstance]         
     setCategory: AVAudioSessionCategoryRecord
     error: &error];

it even records with a higher volume. Best of luck...