问题
I am making a app that requires internal sound to be recorded, any solutions?
回答1:
The is no public iOS API that will allow you to record all internal sound that an app or the device can make. Only certain types of internal sound can be recorded, for instance sounds produced by an app using Audio Queues or the RemoteIO Audio Unit.
For recording external sound, Apple's SpeakHere sample code might be appropriate.
来源：https://stackoverflow.com/questions/7620131/record-internal-sound-iphone-sdk