iphone - AVFoundation, how to turn off the shutter sound when captureStillImageAsynchronouslyFromConnection? - Stack Overflow

iphone - AVFoundation, how to turn off the shutter sound when captureStillImageAsynchronouslyFromConnection? - Stack Overflow: "Then I used third-party app to extract photoShutter.caf from Documents directory (DiskAid for Mac). Next step I opened photoShutter.caf in Audacity audio editor and applied inversion effect, it looks like this on high zoom:"