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Is there a way to record the sound of a device on an iPhone?

AVAudioRecorder allows you to record external sound. However, I want to record the sound made by my application (through numerous AVAudioPlayers), is this possible on the iPhone?

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ios objective-c iphone cocoa-touch core-audio
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If you want to record the sounds that the iOS application makes, you need to use an API with a lower level of leverage, such as Audio Unit RemoteIO or audio queues with raw PCM audio samples.

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